Timemachine backups failing
I got a new mac book pro M1 and connected it to my NAS for time machine backups. The initial backup will start, complete about 20 GB (out of 65 GB). then it will stop and I will get a message saying the backup could not be completed. If I open the Time machine prefrences and click on the info bubble I get the message saying:
"Time Machine could not complete backup to *nas IP address* . An Error occured while copying files."
If I try to select the disk I get this error: " The image macbook pro.sparsebundle is in use. Try ejecting the disk image"
I can use finder to connect to the NAS, no problems there. I have tried rebooting the mac, rebooting the NAS, deleting all the time machine data on the nas, and reformating the nas.
Any ideas?
Thanks.
MacBook Pro (2020 and later)