On Friday I backed up the songs from the internal drive on my VS-1680. The old drive has 2 partitions, just less than 4 GB. I'm not the original owner, but I assume it's 20 year old original equipment. I replaced it with a new 32 GB SSD card in a 2.5" IDE drive adapter.
The VS-1680 started up, said "Initializing IDE" and "Please Wait" ... and that was Friday night. Now it's Sunday and it's still going.
The manual gives a time estimate for physically formatting a ZIP disk, which works out to about 10 MB per minute. This is going slower than that, if it's only initializing the 16 GB it can use. If it's formatting the whole 32 GB for some reason, it should be finished by tomorrow morning...