Time Machine Reports Disk Full - But It's Not
Macbook Pro (2013), Ventura 13.7.1, 500GB internal disk; Time Machine reports disk is full, but also reports 999.77 GB of a 1 TB disk is available. Why?
MacBook Pro 13″, macOS 13.7
How much free space is on your internal drive?
Too little free space on the internal drive can result in the TM message you got.