A:Answer The number of items to be stored is determined by the size of the file. For pictures, the size varies greatly, with RAW files being the largest, and for videos, the duration being the key factor. As to the lifecycle of the USB Flash drive itself, I refer you to this article: https://www.getusb.info/what-is-the-life-cycle-of-a-usb-flash-drive/
You might also consider optical media as a permanent back-up. Although smaller in capacity, they last years, when properly recorded and stored: (https://www.canada.ca/en/conservation-institute/services/conservation-preservation-publications/canadian-conservation-institute-notes/longevity-recordable-cds-dvds.html)
The key to optical disc usage is maintaining a working disc reader. Today, many computers ship without drives. But, external USB optical drives are readily available and not expensive.
