Add-ons Back-up Issue

My HA installation has been saving a daily backup to my Raspberry Pi and NAS without issue until last week when I got the following error message which has occurred ever since.

Please can anyone advise what the issue may be. I am also a bit confused since one sentence seems to suggest the backup was successful while the other sentence suggests it wasn't.

Thanks in advance for any guidance that can be offered.

Do you have sufficient space available on the pi to store a full backup?

Yes, I checked that - plenty available.

I've just done a system reboot and did a back-up, which did not result in an error report. Hopefully this has fixed it but will monitor over the coming days.

A good chance that this cleared your /tmp folder which was 'full' and that allowed you to resume.
A tip, I bet you are running with close to half full on your drive. HA zips up the contents of the active config and stores it on the drive during backup, so if you get at or over half full, you have a problem like this. If this sounds familiar, consider getting a bigger media or loosing some older backups, reducing the database size, stuff like that to keep the backup working.

Same issue here: after upgrade from 2026.5.4 to 2026.6.4 transferring backups to NFS mounted location fails. Logs complain about permission: Unexpected error for hassio.NUC_drive: Could delete backup at /data/mounts/NUC_drive/Automatic_backup_2026.5.4_2026-06-25_05.04_44002867.tar: [Errno 13] Permission denied: '/data/mounts/NUC_drive/Automatic_backup_2026.5.4_2026-06-25_05.04_44002867.tar'

I submitted a defect: Issue · GitHub