I'm running LibreElec on a Raspberry Pi 3 with a 3TB USB drive attached.
I back up onto a 1TB & 2Tb USB drives attached to a W10 PC over my LAN. I have software that will distribute the files between the two backup disks.
Ripping dvds is done on a W7 PC with the mp4s copied over the LAN to the 3TB drive.
This was all working well until yesterday when I started to get "access is denied" messages when trying to backup.
I'm good with Windows but a dunce at Linux. Does anyone have a suggestion of things to try?