Time Machine won't use external drive
I have two external drives set up as backups for MacBook with Time Machine. TM stopped using one of them about a month ago even though it is still designated as a backup disk. Looking for suggestions.
MacBook
Not really. Could be the drive.
Are they directly connected to the Mac? I doubt a hub would cause any issues.
I don't know why it would just stop backing up to it. It would make more sense if it kept failing the backups and starting over. That would tend to indicate a problem communicating with the drive.