Time Machine Backup Size Keeps Growing and Failing
I have been using a 3TB Time Capsule (802.11ac / Firmware version 7.7.9) for many years without any issues. I am using it as a router and as a backup drive for my Mid 2011 iMac 27" / 2.7GHz Core i5 / 16GB RAM running macOS High Sierra 10.13.6.
Recently, a message appeared on my computer:
“Time Machine completed a verification of your backups on Data (name of the backup drive). To improve reliability, Time Machine must create a new backup for you.”
Since then, Time Machine has been incapable of recreating a full backup of my computer. It starts backing up, gets close to the end and then the backup size keeps growing and growing and growing until there is no more space on the Time Capsule and Time Machine tells me that the backup failed.
I tried erasing and reformatting the Time Capsule Drive via Disk Utility, but the result is the same and the backups keep failing because their size keeps growing for no apparent reason. I have around 1.5TB of data on my computer and the Time Capsule has 3TB of space, so there shouldn't be a problem backing
Any help with this issue would be greatly appreciated!