Definition - What does Offline Storage mean?
Offline storage refers to any storage medium that must be physically inserted into a system every time a users wants to access or edit data. Offline storage can be any type of internal or external storage that can easily be removed from the computer.
Offline storage is also known as removable storage.
Techopedia explains Offline Storage
Offline storage is any storage that is not currently online, live or connected to the computer. The data stored in offline storage remains permanently in the storage device even if it’s disconnected or unplugged from the computer after the data has been stored. Offline storage is generally portable in nature and can be used on different computer systems. Common examples of offline storage include floppy disks, compact disks and USB sticks.