kindle reports folder as nearly full

wallcraft · 04-01-2025, 11:00 PM

I run my Kindle Colorsoft in airplane mode, and all its books were installed and managed by Calibre. I have about 6,300 ebooks on the Colorsoft.

When I install more ebooks I get a message on the kindle that a directory is nearly full with 2000 entries and it suggests I create a new folder in Documents. Is there a change I need to make to how Calibre loads ebooks onto my Kindle? My current save template is:

{author_sort}/{title} - {authors}

I have more than 3,000 authors, so perhaps there are to many author_sort folders.

Quoth · 04-02-2025, 07:39 AM

With long filenames the filename will take multiple directory entries (on FAT) and the root of FAT is limited to 32K or 64K entries (I forget which).
Though I thought the Colorsoft used MTP and thus could be ext4 natively, so it's odd.

put all files in "books" instead?

fogice · 04-02-2025, 09:59 AM

Maybe {author_sort[0]}/{author_sort}/{title} - {authors}

That should give you 26 single letter folders. Of course, you would have to either reload all the current books, or try moving them into the folders on your own (I have no idea if that would mess up the Kindle internal database).

wallcraft · 04-04-2025, 10:28 AM

The Kindle gets connected as a MTP device, so I can't actually see the folder structure on my Windows PC.

I have added {author_sort[0]}/ to my save template, which should mean that the directory will only grow by 26 more sub-folders. Hopefully this is enough to keep the directory from overflowing.

The only other option I am aware of is to scrub the Kindle and reload all the ebooks with the new directory structure. This is possible obviously, but it took me days to get the ebooks on the Kindle (and indexed) in the first place.

04-01-2025, 11:00 PM	#1
wallcraft reader Posts: 6,977 Karma: 5183568 Join Date: Mar 2006 Location: Mississippi, USA Device: Kindle 3, Kobo Glo HD	kindle reports folder as nearly full I run my Kindle Colorsoft in airplane mode, and all its books were installed and managed by Calibre. I have about 6,300 ebooks on the Colorsoft. When I install more ebooks I get a message on the kindle that a directory is nearly full with 2000 entries and it suggests I create a new folder in Documents. Is there a change I need to make to how Calibre loads ebooks onto my Kindle? My current save template is: {author_sort}/{title} - {authors} I have more than 3,000 authors, so perhaps there are to many author_sort folders.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Folder full of books disappeared from my Max Lumi	Vermilion Scans	Onyx Boox	7	08-01-2022 06:49 AM
Amazon Fire e-Books onto documents folder of Kindle folder	Maverick1962	Kindle Fire	1	01-20-2020 02:05 AM
Author folder ending in full stop — Kobo Aura H2O	seanos	Devices	8	07-20-2015 04:28 AM
Plugin request: send full folder to email	Sam Sahara	Plugins	8	07-05-2015 09:39 PM
Kindle 2 Under Reports by 20 MB	sirbruce	Amazon Kindle	4	04-03-2009 05:40 PM

04-02-2025, 07:39 AM	#2
Quoth Still reading Posts: 14,010 Karma: 105092227 Join Date: Jun 2017 Location: Ireland Device: All 4 Kinds: epub eink, Kindle, android eink, NxtPaper	With long filenames the filename will take multiple directory entries (on FAT) and the root of FAT is limited to 32K or 64K entries (I forget which). Though I thought the Colorsoft used MTP and thus could be ext4 natively, so it's odd. put all files in "books" instead?

04-02-2025, 09:59 AM	#3
fogice Addict Posts: 254 Karma: 49504 Join Date: May 2014 Device: Kobo Libra 2	Maybe {author_sort[0]}/{author_sort}/{title} - {authors} That should give you 26 single letter folders. Of course, you would have to either reload all the current books, or try moving them into the folders on your own (I have no idea if that would mess up the Kindle internal database).

04-04-2025, 10:28 AM	#4
wallcraft reader Posts: 6,977 Karma: 5183568 Join Date: Mar 2006 Location: Mississippi, USA Device: Kindle 3, Kobo Glo HD	The Kindle gets connected as a MTP device, so I can't actually see the folder structure on my Windows PC. I have added {author_sort[0]}/ to my save template, which should mean that the directory will only grow by 26 more sub-folders. Hopefully this is enough to keep the directory from overflowing. The only other option I am aware of is to scrub the Kindle and reload all the ebooks with the new directory structure. This is possible obviously, but it took me days to get the ebooks on the Kindle (and indexed) in the first place.

Advert