> In my case, the NAS is a Synology server. Same here. I'm also using BTRFS (I've not had a problem and my understanding is Synology doesn't use the flakier fe

> In my case, the NAS is a Synology server. Same here. I'm also using BTRFS (I've not had a problem and my understanding is Synology doesn't use the flakier features of BTRFS). I can't remember if I'm using AFP or SMB (SMB I think is the only one Apple supports), but my backup is encrypted and I have a specific user. I'm not sure BTRFS matters all that much because the backup is a disk image. When I've had them get corrupted I've run disk utility on the disk image to fix things--there's a lot of layers to unwind. I hear stories of people having issues with similar setups, but I haven't (I know that's a sucky answer to hear). Years and years ago I felt like I would get a corrupt backup when I closed my lid during a network backup (I believe this was pre-APFS), but I haven't noticed an issue in years. I have it auto-backup and it usually does it at night when the lid is closed and it's charging. In Snapshot Replication I have a daily snapshot created at midnight with a 2 snapshot retention. I tend not to run out of space, so I'm fine with any deletes taking a few days to roll off. "Recover" under "Recovery" can restore old snapshots easily. I do this for most all of my Shared Folders.