Why does a copy of a 2TB Time Machine database backup file fail to copy to a 4TB drive with the error the destination drive is too small to hold the source drive data? This happens after 4-5 day of saying Preparing to Copy and 2+ days of Copying. While copying, when the copy process gets to 2TB from the source drive the window says 0 bytes left to copy, but keeps going and eventually says the destination drive is too small??
These are both USB external drives (Seagate) and I'm running a Mid-2102 Macbook Pro with 16GB & 500GB, & the I7 processor.
Is there something I need to do to make this work? My 2TB drive is full & has started purging older backups, that I would rather keep.
I haven't tried since upgrading to Catalina, so this was with the latest OS X 10.14.X.