No more room and too many Macintosh HD Data Drives
I am at capacity - 121.02 GB (this is a computer revived from my daughter) and disk utility shows that I have 15.05 GB used, 99.67 GB in "other volumes", and 6.29 GB Free. I cannot update apps, or OS. I have moved all to the cloud and cleared off all other items I could.
It does not appear to be partitioned, but I do show three Macintosh HD-Data Drives. Is that normal? This is my first Mac and I really want to keep using it, but if I can't update the apps, then I am stuck.
How do I get access or combine these drives so I can recoup the 99.67 GB in "other volumes" and use this Mac to its fullest capacity?
TIA.
iMac Pro