I have copied such files to an external drive where they stay for now. Old, slow mechanical drives can be used esp those that are not continually connected (and running) on a computer. This is part of a backup plan. Advice is further (for safety and security reasons) to store these drives off site or even better to store the files on the Cloud.
Just leave current (active sample set files) on your HW SSD. Easy to switch back and forth without deleting anything.
Rgds,
Ed