64GB MicroSDXC fully working in PE and Leger Calibre/Dropsync discussion

helf · 09-09-2012, 08:36 PM

*WARNING: I'm very long winded*

Hi, guys. I recently bought a Sandisk 64GB MicroSDXC Class 10 ($65) card off Newegg to see what it would function in and, hopefully, to use it in my eDGe. After a bit of fiddling, I got it working 100%. I'm getting 8-10MB/s writes and 15-20MB/s reads off it. Faster than the internal 3GB of storage!

Sandisk 64GB MicroSDXC Card

**My eDGe is a Pocket eDGe running the Golden Allmine update. I'll be wiping it and installing the Allmine Universal pretty soon, but I do not think this difference will matter for this to work.**

When you get the card I think it has an exFAT partition on it. The eDGe will tell you the card needs to be formatted, format it, then crash and reboot while trying to mount it. If you leave the card in, it will boot to desktop, try mounting the card, then crash and burn again. The eDGe wants a generic, standard FAT32 partition to function. Windows, by default, will only partition volumes of up to 32GB to FAT32. Larger than that and it will only show NTFS as a FS option when you go to format. I got around this by grabbing fat32format by Ridgecrop Consultants, LTD. I ran it under Windows 7 Ultimate 64bit* without trouble. Just select the drive and tell it to format. I left all the default settings as they were. Popped the card back in the eDGe, booted it up and it saw it and mounted it without issue.

*If you are running Linux or Mac OSX, you should just be able to use their various tools to create a proper 64gb partition.

TL,DR version:

Buy Sandisk 64GB MicroSDXC Card from Newegg
Pop it in your PC and format to a proper FAT32 partition using fat32format by Ridgecrop Consultants, LTD (or use your favorite OS's various tools)
Slap newly formatted card in eDGe
Party because you now have ~64GB (ok, more like 60GB) of usable storage space

Leger Calibre and Dropsync Pro

The whole reason for me getting the 64GB card was to, A. see if it would work, and, B. try out a syncing idea I was hoping would work. I have been using Calibre for a few years now and like it a lot. I HATED having to sync books to my eDGe, though. Seemed a giant PITA and waste of time.

Enter Leger Calibre.

Leger Calibre is free (author will gladly accept a $2 donation, though). The minimum Android OS requirement is v2.2. And it runs beautifully on the eDGe. Leger Calibre lets you copy over an entire Calibre Library to an SD card and open it. It doesn't let you make changes, it is just a viewer.

Now that that part was covered and working well, I also wanted to be able to remotely sync changes I made to Calibre's Library on my PC and not have to manually move over files.

Enter Dropsync Pro.

Dropsync Pro allows full 2-way Dropbox folder synchronization. The Official Dropbox program is pitiful and about useless. You will need to use Dropsync Pro as the free version has a very small folder size limit and other limitations. It is just $5 and completely worth it. Its minimum Android OS requirement is v2.0.

I tossed together a relatively large Calibre Library to test out and see how well everything worked together.

I made a folder in my desktop's Dropbox folder called "ebooks" and set it as the library location in Calibre.

I fired up Dropsync Pro and specified a folder on my SD card (calibre_test) and chose to sync my Dropbox folder, "ebooks", with it.

Here is Dropsync Pro syncing the contents to the SD card.

This was taking forever, so I popped the SD card back in my PC and just directly copied the Library over.

Anyways, after that was finished, I launched Leger Calibre. It defaults to a blank screen with a single "Add Library" button. I clicked on it and told it to just automatically find Calibre Libraries loaded on the SD card. It took a minute or two to scan my card. It found the Library and I was greeted with this screen:

Tapping on "calibre_test" loads up the Library (may take a few seconds to load depending on book volume) with a default view that is just the books listed in any of the following views - Recently Read, Author Last Name Asc/Desc, Book Title Asc/Desc.

If you open the apps menu and choose 'Sorts', you can select from the view options 'Tags', 'Authors', and 'Series'.

Tags

Authors

Series

And that is about the extent of the programs options. If you click on a tag, author, or series, it will pop up and give you the option of displaying just the book(s) that meet that criteria -

Just the chosen authors books -

Clicking on a book will bring up a little information dialogue box showing the books cover, author(s), publisher, format(s),tag(s), and comments.

Clicking on the books cover image will bring up the default options that you will be familiar with after using an edge -

JUST choose "open" unless you really want to put the file in your eDGe's default Library program.

That is about it. Leger Calibre has worked flawlessly, so far, for me. I plan on getting a Pro Dropbox account so I can add multiple Calibre Libraries (I wouldn't suggest having a massive single library and, instead, recommend breaking it into more specific individual ones just for speed-sake on the eDGe).

For anyone wondering "why? why would you want gigs and gigs of ebooks on your ereader?"; my future profession I am currently going to school for will require lots and lots of traveling and I do not want to lug around a laptop all the time. My eDGe and phone will suffice for basically everything. Having this ability will be fantastic when I am away from home for 2-6 weeks at a pop.

I hope this has been helpful to someone. These few apps and the memory card will extend the lifespan of my edge for a very long time. I'm hoping that by the time I have to move off it, for whatever reasons, another similar device will be out. As of right now, it is still the most useful and versatile ebook reader, IMO.

p.s.

There is also an app called Calibre Library by HumanoidApps that is a dedicated viewer for Calibre's book server if you host your own or are curious about that/

*UPDATE 10/31/2013 - 128GB SDXC*

TL, DL version: SUCCESS!, as of update time, on just the 10.1 eDGe.

Materials:

Komputerbay 128GB SDXC UHS-1 Card - $79 (I risked a no-name. Works awesome)

Brandless MicroSD to SD extender - $30

I bought these to use in my Galaxy Note II since I was putting a Zero Lemon 9300mAh extended battery + rubberized case on it. Which, btw, is /amaaazing/ if you have a GNII. I had planned on doing this for awhile but just now got around to it.

After my earlier failure, I decided to try again. If you use fat32format and set it to use either 16kb, 32kb, or 64kb sectors, the EE will read and use the 128GB card just fine! I'm not entirely sure why it wasn't working before. I suggest using either 32 or 64kb sectors as 16kb is the slowest for the EE. When set to 64kb, the EE checks and mounts the card in just a few seconds. 32kb is a bit slower and 16kb is quite a bit slower. Anything under 16kb and the EE will reset itself.

I'm going to use my EE and see how stable it is, but so far so good!

[Image exceeds guidelines - MODERATOR]

-- Galaxy Note II stuffs --

I installed the adapter in my GNII, wrapped it around to the top of the extended battery, put a dab of superglue on it to hold it in place, popped the card in (after formatting it on my PC) and slapped the rubberized casing back around the phone. I did trim the stiffening ribs on the inside edge of the case where the card is sitting to give a little extra room. It is a very tight fit (bulges a little), but works perfectly and no worries on the adapter sliding around or anything.

[Images exceed guidelines - MODERATOR]

And now I have 120GB of usable storage in my Galaxy Note II plus an epic battery. I plan on buying a 256GB card when the prices drop to something reasonable

glow · 09-10-2012, 11:25 AM

Wow, thanks Helf! This is a lot of great information.

DianNC · 09-10-2012, 02:27 PM

Wonderful, informative post.

Thank you!

helf · 09-11-2012, 02:46 AM

I've noticed one little quirk after using the 64GB card for a few days --

When I reboot the eDGe after shutting it down fully, it spends a few seconds "checking SD Card for errors". It has yet to tell me it has found anything wrong. I never noticed this with my 16GB card. I dunno if it is shutting down before it can cleanly unmount the card? Any ideas? Otherwise, it is working perfectly. I played some podcasts off it today for about 2 hours with it underclocked/volted to 156mhz and had no problems.

Gunnerp245 · 09-11-2012, 07:38 AM

@helf
My EE & PE has displayed the check message every time it starts since I got them.

Filark · 09-12-2012, 02:32 AM

Thanks for the info, Helf!

I use Calibre and have just been pulling books over through my LAN connection. Your way looks intriguing!

helf · 09-12-2012, 03:19 AM

Quote:

Originally Posted by Gunnerp245

@helf
My EE & PE has displayed the check message every time it starts since I got them.

ah, OK. I guess I'm just now noticing it because it's taking more than a split second since the card is so large.

helf · 09-16-2012, 11:51 AM

Figures. You can now get the same memory card off Amazon for $55

http://www.amazon.com/SanDisk-microS...=pd_sim_cps_11

teh603 · 09-16-2012, 11:59 AM

I'll be honest, I'd rather have multiple smaller cards than have to mess with the nasty piece of vendor lock-in that is exFAT. Never mind that it also requires a lot more resources to work with, and that the only real supporters right now are Apple and MS. Android also has full ext4 support and probably a complete-ish BTRFS implementation as well, so you might want to look into those formats instead.

helf · 09-16-2012, 06:20 PM

Quote:

Originally Posted by teh603

I'll be honest, I'd rather have multiple smaller cards than have to mess with the nasty piece of vendor lock-in that is exFAT. Never mind that it also requires a lot more resources to work with, and that the only real supporters right now are Apple and MS. Android also has full ext4 support and probably a complete-ish BTRFS implementation as well, so you might want to look into those formats instead.

OK, Multiple smaller cards is an inconvenience I was aiming to alleviate and I stated in the parent thread that you needed to use a real FAT32 partition, NOT exFAT. FAT32 sucks, but everything supports it.

*deleted bit about FS's*

I forgot that Android does indeed handle ext* .. I'll give formatting the card to that a shot and see how it does.

Gerrye · 01-16-2013, 11:06 AM

@Helf, I was just wondering if any other discoveries or revelations had been found to update this post....

Quote:

Originally Posted by helf

OK, Multiple smaller cards is an inconvenience I was aiming to alleviate and I stated in the parent thread that you needed to use a real FAT32 partition, NOT exFAT. FAT32 sucks, but everything supports it.

*deleted bit about FS's*

I forgot that Android does indeed handle ext* .. I'll give formatting the card to that a shot and see how it does.

helf · 01-18-2013, 01:20 AM

Hey, Gerrye. I'm actually going to be mucking with this shortly. I've been busy with school and work and had to set aside most of my projects...

I had my PE develop Alzheimers earlier today. Deleting the dalvik cache and rebooting mostly fixed it (how odd?) and then I got the bright idea to mess with the prop file again and fully broke it, lol. So I'll be reflashing it tomorrow and testing out some more FSs on the SD card. I gave my brother my 64gb card, so I'll be doing all the testing on my trusty 16gb unit.

I'm hoping to be able to buy a 128gb card for my EE next month, I'll definitely update with how well that goes.

Gerrye · 01-18-2013, 01:51 PM

I'll be looking for your updates....

Quote:

Originally Posted by helf

Hey, Gerrye. I'm actually going to be mucking with this shortly. I've been busy with school and work and had to set aside most of my projects...

I had my PE develop Alzheimers earlier today. Deleting the dalvik cache and rebooting mostly fixed it (how odd?) and then I got the bright idea to mess with the prop file again and fully broke it, lol. So I'll be reflashing it tomorrow and testing out some more FSs on the SD card. I gave my brother my 64gb card, so I'll be doing all the testing on my trusty 16gb unit.

I'm hoping to be able to buy a 128gb card for my EE next month, I'll definitely update with how well that goes.

kelemvor · 01-26-2013, 06:59 PM

So is this a way that I can use Calibre on my PC to tag things, convert them, etc. Then have it dump them to my dropbox folder and all my devices would automatically get updated with the new books in the library?

That's what I'm trying to accomplish since I have my phone, my wife's phone, and our tablet. I just have to install Dropsync on each of the devices?

Can I then use pretty much any reader as long as it points to the right folder?

Very interesting idea. I was going to look at Moon Reader's dropbox sync but there's not a ton of info on exactly how it works.

helf · 01-27-2013, 01:24 AM

That is pretty much how it'll work depending on your reader program. If it supports pointing at a directory, then yes, that'll work fine. Or you can just use LegerCalibre to view the library on all the Android devices and when you tell it to open a book, it'll open in the program set for the file type.

So, for my eDGe, I sync using Dropbox on my PC and DropSync on my eDGe, then I just fire up LegerCalibre and use it to browse my library. When I find a book I want, I just open it and, depending on the format, it'll open in say PerfectViewer (for comics) or the eDGe Library app for ePub, or Adobe Reader for PDFs.

I haven't tested out Moon Readers Dropbox support yet. I've been happy with this setup, so haven't felt the need. Oh, ES File Explorer (comes in the ROM on the eDGes) supports Dropbox directly, as well as a buncha other online storage systems with the latest versions.

09-09-2012, 08:36 PM	#1
helf Zealot Posts: 124 Karma: 500250 Join Date: Jun 2011 Device: Entourage Pocket eDGe, Entourage eDGe, Samsung Galaxy Note II	*128GB UPDATE64GB MicroSDXC fully working in PE and Leger Calibre/Dropsync discussion WARNING: I'm very long winded Hi, guys. I recently bought a Sandisk 64GB MicroSDXC Class 10 ($65) card off Newegg to see what it would function in and, hopefully, to use it in my eDGe. After a bit of fiddling, I got it working 100%. I'm getting 8-10MB/s writes and 15-20MB/s reads off it. Faster than the internal 3GB of storage! Sandisk 64GB MicroSDXC Card My eDGe is a Pocket eDGe running the Golden Allmine update. I'll be wiping it and installing the Allmine Universal pretty soon, but I do not think this difference will matter for this to work.** When you get the card I think it has an exFAT partition on it. The eDGe will tell you the card needs to be formatted, format it, then crash and reboot while trying to mount it. If you leave the card in, it will boot to desktop, try mounting the card, then crash and burn again. The eDGe wants a generic, standard FAT32 partition to function. Windows, by default, will only partition volumes of up to 32GB to FAT32. Larger than that and it will only show NTFS as a FS option when you go to format. I got around this by grabbing fat32format by Ridgecrop Consultants, LTD. I ran it under Windows 7 Ultimate 64bit* without trouble. Just select the drive and tell it to format. I left all the default settings as they were. Popped the card back in the eDGe, booted it up and it saw it and mounted it without issue. If you are running Linux or Mac OSX, you should just be able to use their various tools to create a proper 64gb partition. TL,DR version: Buy Sandisk 64GB MicroSDXC Card from Newegg Pop it in your PC and format to a proper FAT32 partition using fat32format by Ridgecrop Consultants, LTD (or use your favorite OS's various tools) Slap newly formatted card in eDGe Party because you now have ~64GB (ok, more like 60GB) of usable storage space Leger Calibre and Dropsync Pro* The whole reason for me getting the 64GB card was to, A. see if it would work, and, B. try out a syncing idea I was hoping would work. I have been using Calibre for a few years now and like it a lot. I HATED having to sync books to my eDGe, though. Seemed a giant PITA and waste of time. Enter Leger Calibre. Leger Calibre is free (author will gladly accept a $2 donation, though). The minimum Android OS requirement is v2.2. And it runs beautifully on the eDGe. Leger Calibre lets you copy over an entire Calibre Library to an SD card and open it. It doesn't let you make changes, it is just a viewer. Now that that part was covered and working well, I also wanted to be able to remotely sync changes I made to Calibre's Library on my PC and not have to manually move over files. Enter Dropsync Pro. Dropsync Pro allows full 2-way Dropbox folder synchronization. The Official Dropbox program is pitiful and about useless. You will need to use Dropsync Pro as the free version has a very small folder size limit and other limitations. It is just $5 and completely worth it. Its minimum Android OS requirement is v2.0. I tossed together a relatively large Calibre Library to test out and see how well everything worked together. I made a folder in my desktop's Dropbox folder called "ebooks" and set it as the library location in Calibre. I fired up Dropsync Pro and specified a folder on my SD card (calibre_test) and chose to sync my Dropbox folder, "ebooks", with it. Here is Dropsync Pro syncing the contents to the SD card. This was taking forever, so I popped the SD card back in my PC and just directly copied the Library over. Anyways, after that was finished, I launched Leger Calibre. It defaults to a blank screen with a single "Add Library" button. I clicked on it and told it to just automatically find Calibre Libraries loaded on the SD card. It took a minute or two to scan my card. It found the Library and I was greeted with this screen: Tapping on "calibre_test" loads up the Library (may take a few seconds to load depending on book volume) with a default view that is just the books listed in any of the following views - Recently Read, Author Last Name Asc/Desc, Book Title Asc/Desc. If you open the apps menu and choose 'Sorts', you can select from the view options 'Tags', 'Authors', and 'Series'. Tags Authors Series And that is about the extent of the programs options. If you click on a tag, author, or series, it will pop up and give you the option of displaying just the book(s) that meet that criteria - Just the chosen authors books - Clicking on a book will bring up a little information dialogue box showing the books cover, author(s), publisher, format(s),tag(s), and comments. Clicking on the books cover image will bring up the default options that you will be familiar with after using an edge - JUST choose "open" unless you really want to put the file in your eDGe's default Library program. That is about it. Leger Calibre has worked flawlessly, so far, for me. I plan on getting a Pro Dropbox account so I can add multiple Calibre Libraries (I wouldn't suggest having a massive single library and, instead, recommend breaking it into more specific individual ones just for speed-sake on the eDGe). For anyone wondering "why? why would you want gigs and gigs of ebooks on your ereader?"; my future profession I am currently going to school for will require lots and lots of traveling and I do not want to lug around a laptop all the time. My eDGe and phone will suffice for basically everything. Having this ability will be fantastic when I am away from home for 2-6 weeks at a pop. I hope this has been helpful to someone. These few apps and the memory card will extend the lifespan of my edge for a very long time. I'm hoping that by the time I have to move off it, for whatever reasons, another similar device will be out. As of right now, it is still the most useful and versatile ebook reader, IMO. p.s. There is also an app called Calibre Library by HumanoidApps that is a dedicated viewer for Calibre's book server if you host your own or are curious about that/ *UPDATE 10/31/2013 - 128GB SDXC* TL, DL version: SUCCESS!, as of update time, on just the 10.1 eDGe. Materials: Komputerbay 128GB SDXC UHS-1 Card - $79 (I risked a no-name. Works awesome) Brandless MicroSD to SD extender - $30 I bought these to use in my Galaxy Note II since I was putting a Zero Lemon 9300mAh extended battery + rubberized case on it. Which, btw, is /amaaazing/ if you have a GNII. I had planned on doing this for awhile but just now got around to it. After my earlier failure, I decided to try again. If you use fat32format and set it to use either 16kb, 32kb, or 64kb sectors, the EE will read and use the 128GB card just fine! I'm not entirely sure why it wasn't working before. I suggest using either 32 or 64kb sectors as 16kb is the slowest for the EE. When set to 64kb, the EE checks and mounts the card in just a few seconds. 32kb is a bit slower and 16kb is quite a bit slower. Anything under 16kb and the EE will reset itself. I'm going to use my EE and see how stable it is, but so far so good! [Image exceeds guidelines - MODERATOR] -- Galaxy Note II stuffs -- I installed the adapter in my GNII, wrapped it around to the top of the extended battery, put a dab of superglue on it to hold it in place, popped the card in (after formatting it on my PC) and slapped the rubberized casing back around the phone. I did trim the stiffening ribs on the inside edge of the case where the card is sitting to give a little extra room. It is a very tight fit (bulges a little), but works perfectly and no worries on the adapter sliding around or anything. [Images exceed guidelines - MODERATOR] And now I have 120GB of usable storage in my Galaxy Note II plus an epic battery. I plan on buying a 256GB card when the prices drop to something reasonable Last edited by Dr. Drib; 01-14-2014 at 08:58 AM. Reason: Added 128GB SDXC card update

09-16-2012, 11:59 AM	#9
teh603 Autism Spectrum Disorder Posts: 1,212 Karma: 6244877 Join Date: Sep 2011 Location: Coastal Texas Device: Android Phone	I'll be honest, I'd rather have multiple smaller cards than have to mess with the nasty piece of vendor lock-in that is exFAT. Never mind that it also requires a lot more resources to work with, and that the only real supporters right now are Apple and MS. Android also has full ext4 support and probably a complete-ish BTRFS implementation as well, so you might want to look into those formats instead. Last edited by teh603; 09-16-2012 at 12:05 PM.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Calibre 0.8.60 - Kobo database not fully supported	Rob557	Devices	9	01-14-2016 07:02 AM
Hello. Help needed to fully uninstall CALIBRE.	JCarabe	Introduce Yourself	5	08-19-2012 11:00 AM
PRS-T1 sideloading or syncing: dropsync?	grimborg	Sony Reader	0	01-07-2012 01:06 PM
Calibre not fully ejecting nook	jvik	Calibre	0	01-12-2011 09:41 AM
Calibre beta available that fully integrates custom fields	chaley	Calibre	206	10-03-2010 02:28 AM

09-10-2012, 11:25 AM	#2
glow Book and Gadget Fan Posts: 199 Karma: 19698 Join Date: Mar 2011 Location: NJ, USA Device: Nooks GL3, ST w/GL, Color, HD+; Kindles Voyage & Paperwhite; PE, EE	Wow, thanks Helf! This is a lot of great information.

09-10-2012, 02:27 PM	#3
DianNC Banned Posts: 1,431 Karma: 5222495 Join Date: Jun 2011 Device: Nook Color, Entourage Pocket Edge, iPod Touch 5th Gen	Wonderful, informative post. Thank you!

09-11-2012, 02:46 AM	#4
helf Zealot Posts: 124 Karma: 500250 Join Date: Jun 2011 Device: Entourage Pocket eDGe, Entourage eDGe, Samsung Galaxy Note II	I've noticed one little quirk after using the 64GB card for a few days -- When I reboot the eDGe after shutting it down fully, it spends a few seconds "checking SD Card for errors". It has yet to tell me it has found anything wrong. I never noticed this with my 16GB card. I dunno if it is shutting down before it can cleanly unmount the card? Any ideas? Otherwise, it is working perfectly. I played some podcasts off it today for about 2 hours with it underclocked/volted to 156mhz and had no problems.

09-11-2012, 07:38 AM	#5
Gunnerp245 Gadget Freak Posts: 1,169 Karma: 1043832 Join Date: Nov 2007 Location: US Device: EE, Note 8	@helf My EE & PE has displayed the check message every time it starts since I got them.

09-12-2012, 02:32 AM	#6
Filark Armed with a smile :) Posts: 1,421 Karma: 2463560 Join Date: Sep 2009 Location: California, USA Device: enTourage eDGe & Pocket eDGe, Samsung Galaxy Note II	Thanks for the info, Helf! I use Calibre and have just been pulling books over through my LAN connection. Your way looks intriguing!

09-16-2012, 11:51 AM	#8
helf Zealot Posts: 124 Karma: 500250 Join Date: Jun 2011 Device: Entourage Pocket eDGe, Entourage eDGe, Samsung Galaxy Note II	Figures. You can now get the same memory card off Amazon for $55 http://www.amazon.com/SanDisk-microS...=pd_sim_cps_11

01-18-2013, 01:20 AM	#12
helf Zealot Posts: 124 Karma: 500250 Join Date: Jun 2011 Device: Entourage Pocket eDGe, Entourage eDGe, Samsung Galaxy Note II	Hey, Gerrye. I'm actually going to be mucking with this shortly. I've been busy with school and work and had to set aside most of my projects... I had my PE develop Alzheimers earlier today. Deleting the dalvik cache and rebooting mostly fixed it (how odd?) and then I got the bright idea to mess with the prop file again and fully broke it, lol. So I'll be reflashing it tomorrow and testing out some more FSs on the SD card. I gave my brother my 64gb card, so I'll be doing all the testing on my trusty 16gb unit. I'm hoping to be able to buy a 128gb card for my EE next month, I'll definitely update with how well that goes.

01-26-2013, 06:59 PM	#14
kelemvor Enthusiast Posts: 49 Karma: 10 Join Date: Jan 2013 Device: Android	So is this a way that I can use Calibre on my PC to tag things, convert them, etc. Then have it dump them to my dropbox folder and all my devices would automatically get updated with the new books in the library? That's what I'm trying to accomplish since I have my phone, my wife's phone, and our tablet. I just have to install Dropsync on each of the devices? Can I then use pretty much any reader as long as it points to the right folder? Very interesting idea. I was going to look at Moon Reader's dropbox sync but there's not a ton of info on exactly how it works.

01-27-2013, 01:24 AM	#15
helf Zealot Posts: 124 Karma: 500250 Join Date: Jun 2011 Device: Entourage Pocket eDGe, Entourage eDGe, Samsung Galaxy Note II	That is pretty much how it'll work depending on your reader program. If it supports pointing at a directory, then yes, that'll work fine. Or you can just use LegerCalibre to view the library on all the Android devices and when you tell it to open a book, it'll open in the program set for the file type. So, for my eDGe, I sync using Dropbox on my PC and DropSync on my eDGe, then I just fire up LegerCalibre and use it to browse my library. When I find a book I want, I just open it and, depending on the format, it'll open in say PerfectViewer (for comics) or the eDGe Library app for ePub, or Adobe Reader for PDFs. I haven't tested out Moon Readers Dropbox support yet. I've been happy with this setup, so haven't felt the need. Oh, ES File Explorer (comes in the ROM on the eDGes) supports Dropbox directly, as well as a buncha other online storage systems with the latest versions.