I’ve done everything I can think of and have looked through this and other forums looking for a solution, so I thought I would just post something here and hope that someone has an answer.
I’ve had my PR4100 for a few years and it worked fine for Time Machine backups from my Mac (now on macOS 27) for years. At some point it stopped working consistently for this. I am able to mount the share and usually able to get a few days of backups before I start getting this message:
Once I start getting that message, the backup never completes again. I’ve let it go for 45 days the last time until I decided to turn off Time Machine in the PR4100, delete the share completely and add it back again. I had seen where the “Mobile & Web App Access” should be off, so when I added it back the last time, I made sure that was off. These are my settings:
This all worked again for a few days, but has not worked since yesterday now. The share itself shows that it tried, however (or at least something got updated):
![]()
My setup is all wired ethernet. I know I’ve seen some posts about WiFi backup being an issue. I have attempted this with WiFi turned off, so that’s not it either.
One of the main reasons I have the PR4100 is to do TimeMachine backups. I really don’t want to have a local hard drive attached to my machine when I’ve invested so much in this.
Hopefully someone has an answer. Thanks in advance.

