"No space on device" error while uploading from Calibre via wifi

arox · Yesterday, 09:09 AM

When I first set up KOReader-Calibre (v8.7) wifi connection on both my Kobo Libra 2 and Android phone, uploading the entire library (414 epubs) went like a breeze. But after that, I am getting "no space left on device" error on both devices every time, no matter if I upload one book or many. Restarting KOReader, deleting cache etc, do not help. This error occurs only when uploading via Wi-Fi. USB wired upload does not have this problem. Any idea how to fix this?

Much appreciated!

arox · Yesterday, 09:23 AM

Just to add, checking "Ignore device free space" box on Calibre's SmartDevice app plugin did not help, and space is not an issue on either device.

arox · Today, 07:30 AM

UPDATE: Figured it out. Somehow the inbox folder under Calibre -> wireless management in KOReader got set to /mnt instead of /mnt/onboard, which I guess caused Calibre to run into some kind of permission problem. I have now created an empty subfolder Books under /mnt/onboard/ and set it as both Home and inbox folder, which fixed the issue.

Yesterday, 09:09 AM	#1
arox Junior Member Posts: 3 Karma: 10 Join Date: Jul 2025 Device: Kobo Libra 2	"No space on device" error while uploading from Calibre via wifi When I first set up KOReader-Calibre (v8.7) wifi connection on both my Kobo Libra 2 and Android phone, uploading the entire library (414 epubs) went like a breeze. But after that, I am getting "no space left on device" error on both devices every time, no matter if I upload one book or many. Restarting KOReader, deleting cache etc, do not help. This error occurs only when uploading via Wi-Fi. USB wired upload does not have this problem. Any idea how to fix this? Much appreciated!

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Calibre error message "No Space on Device" when trying to add to CC.	Josieb1	Calibre Companion	2	05-21-2021 04:38 AM
"No space left on device" error	HLS	Devices	1	03-06-2021 09:22 PM
Glo Calibre/Kobo Glo "error communicating with device."	ryuji35	Kobo Reader	81	12-04-2017 05:42 PM
Error "Undecleared prefix: calibre" when uploading to Smashwords	emeraldlake	Calibre	1	12-28-2016 11:11 PM
How to Disable "Auto convert the following books before uploading to device?" Prompt	Breezin123	Conversion	6	02-19-2011 02:22 PM

Yesterday, 09:23 AM	#2
arox Junior Member Posts: 3 Karma: 10 Join Date: Jul 2025 Device: Kobo Libra 2	Just to add, checking "Ignore device free space" box on Calibre's SmartDevice app plugin did not help, and space is not an issue on either device.

Today, 07:30 AM	#3
arox Junior Member Posts: 3 Karma: 10 Join Date: Jul 2025 Device: Kobo Libra 2	UPDATE: Figured it out. Somehow the inbox folder under Calibre -> wireless management in KOReader got set to /mnt instead of /mnt/onboard, which I guess caused Calibre to run into some kind of permission problem. I have now created an empty subfolder Books under /mnt/onboard/ and set it as both Home and inbox folder, which fixed the issue.

Advert