A point to remember technically a duplicate is another word for a backup… can be useful, so don’t go around removing duplicates unless you have a system that is short of space and you cannot install new extra storage… e.g. you have small primary system drive that’s soldered in SSD and no sockets for removable storage. Otherwise use the socketed storage and clone the system drive to a new bigger USB caddied storage device and then replace the internal small storage with the new bigger storage system drive. Plenty of software out there often given away to do that. Far better than constantly fighting with what to delete to fit into restricted space.