Physical computer storage encompasses the use of tangible devices such as hard disk drives (HDDs), solid-state drives (SSDs), USB flash drives, memory cards, and optical discs (CDs/DVDs) to retain and access data on a computer system. These devices facilitate data accessibility even in the absence of an internet connection. They employ diverse storage methods, including magnetic storage in HDDs, flash memory in SSDs and USB drives, and optical storage in CDs/DVDs, with each method being dependent on the technology used for data recording.