CMMC Practice MP.2.121: Control the use of removable media on system components.
CMMC CLARIFICATION (Ref CMMC – Appendix B)
Removable media is any type of media storage that you can remove from your computer or machine, for example, CDs, DVDs, diskettes and USB drives. Write a specific policy for removable media for your company. The policy should cover that there are two types of removable media: write-once media and rewritable media. Limit the use of removable media to the smallest number needed. Scan all removable media for viruses. Track removable media that you own and make sure you reuse and dispose of it properly.