We are working on a new product called PlumePack. It is aimed as being a "Premium Project Manager" : fully featured and without the bugs the actual Project Manager could have, so you could be interested !
For now this product is in Beta version (official release early 2021), so you can test it for free and send us feedbacks !
In your case, with PlumePack you could (your choice)
Choose to copy all files to new location (you can choose to copy only used footages / only active sequence)
Trim files to new location : it will remove frames not used in your timeline and you will save disk space ! The files will keep their original codec and quality, so it's a lossless process ! (No re-encoding).
Here is a link for more information and apply to the Beta (You will receive a mail with download link after filling the form)
Thanks for your answer, I've already applied yesterday cause I found this answer on another thread, but I haven't received an e-mail yet.. I just re-applied and waiting now for the e-mail. If that works, that would be amazing!