Can I delete the Digital Editions\Thumbnails PNGs?

Zero9 · 07-01-2009, 07:50 AM

When I view the few photos I've stored on my PRS-505, I also see a bunch of book covers listed as being able to be viewed as well. While browsing the internal memory, I found these book cover images in this directory:

E:\Digital Editions\Thumbnails\database\media\books

The funny thing is, there are book cover images in this directory for books I've DELETED off my device. I've connected to the device with both Calibre and Adobe Digital Editions, so I'm not sure if these image files were created when I read the ePubs on the PRS-505 or when I connected to it with Adobe Digital Editions. None of the books on my reader are DRM secured.

Any reason why I shouldn't delete them? Any way I can stop them from getting created in the future?

dpierron · 07-01-2009, 08:30 AM

Hi Zero9,

I never noticed this Thumbnail directory before you mentionned it.

It's funny, because the PRS-505 does not display thumbnails of the books stored in its memory, now does it ?

An educated guess would be that they are useless, but when looking a bit deeper, I found out that they are referenced by XML metadata files (e.g. e:\Digital Editions\manifest.xml)...

You can still make a backup, try and delete them, and tell us if you crashed your Reader ...

Cheers,
David.

grooks · 07-01-2009, 10:08 AM

The thumbnails can be deleted. I believe what happens is ADE copies the cover as a separate item. Each book through ADE will have the ebook and accompanying cover which will be saved as a picture. When the book gets deleted the picture does not get deleted.

Renaldo · 07-01-2009, 07:36 PM

I've got the thumbnails without using ePub or ADE. I'm wondering if there is/was a feature that never got implemented that allowed you to browse by cover.

Wetdogeared · 07-02-2009, 05:25 PM

Quote:

Originally Posted by Renaldo

I've got the thumbnails without using ePub or ADE. I'm wondering if there is/was a feature that never got implemented that allowed you to browse by cover.

You can browse by cover (thumbnail) on the PRS-700 which you can then touch to go to that book. Maybe it's just some piece of code that is shared by both devices, but not implemeted on the PRS-505.

WDE.

Renaldo · 07-02-2009, 08:31 PM

Yeah, that must be it, or something like it anyways. Kind of a cool feature, and I can see how it would be convenient on a touch screen.

07-01-2009, 07:50 AM	#1
Zero9 Zealot Posts: 129 Karma: 550 Join Date: Jul 2008 Location: Iowa, USA Device: Kindle Touch	Can I delete the Digital Editions\Thumbnails PNGs? When I view the few photos I've stored on my PRS-505, I also see a bunch of book covers listed as being able to be viewed as well. While browsing the internal memory, I found these book cover images in this directory: E:\Digital Editions\Thumbnails\database\media\books The funny thing is, there are book cover images in this directory for books I've DELETED off my device. I've connected to the device with both Calibre and Adobe Digital Editions, so I'm not sure if these image files were created when I read the ePubs on the PRS-505 or when I connected to it with Adobe Digital Editions. None of the books on my reader are DRM secured. Any reason why I shouldn't delete them? Any way I can stop them from getting created in the future?

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07-01-2009, 08:30 AM	#2
dpierron calibre2opds guru Posts: 533 Karma: 8792 Join Date: Aug 2005 Location: Metz, France Device: iPhone, iPad, PRS-650	Hi Zero9, I never noticed this Thumbnail directory before you mentionned it. It's funny, because the PRS-505 does not display thumbnails of the books stored in its memory, now does it ? An educated guess would be that they are useless, but when looking a bit deeper, I found out that they are referenced by XML metadata files (e.g. e:\Digital Editions\manifest.xml)... You can still make a backup, try and delete them, and tell us if you crashed your Reader ... Cheers, David.

07-01-2009, 10:08 AM	#3
grooks Wizard Posts: 1,326 Karma: 30250 Join Date: Feb 2008 Location: Fort Myers, FL Device: Pocketbook Era, Kobo Forma	The thumbnails can be deleted. I believe what happens is ADE copies the cover as a separate item. Each book through ADE will have the ebook and accompanying cover which will be saved as a picture. When the book gets deleted the picture does not get deleted.

07-01-2009, 07:36 PM	#4
Renaldo Addict Posts: 294 Karma: 250590 Join Date: Feb 2009 Location: The Great Pacific Northwest Device: Kindle 3G + WiFi	I've got the thumbnails without using ePub or ADE. I'm wondering if there is/was a feature that never got implemented that allowed you to browse by cover.

07-02-2009, 08:31 PM	#6
Renaldo Addict Posts: 294 Karma: 250590 Join Date: Feb 2009 Location: The Great Pacific Northwest Device: Kindle 3G + WiFi	Yeah, that must be it, or something like it anyways. Kind of a cool feature, and I can see how it would be convenient on a touch screen.

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