Digital Photo Storage on USB Flash Drives
USB flash drives are increasing in capacity and are more reasonably priced nowadays. It is very convenient form of storage in terms of size and access speed. How long can I store my digital photos on USB Flash Drives?
Although Flash drives appear to be very durable (there are no moving parts as there are for hard drives) and can withstand some harsh environments, the chemical stability of flash USB drives in the long term is unknown.
Currently, there is no significant scientific research to determine how stable this type of storage media is, how it compares in stability to other storage media, and how long it will last. There are several unanswered questions that exist. How will the storage media behave if it is not used for many years and simply left on a shelf? How will the flash USB drive hold up to storage under less than ideal temperature and relative humidity conditions over many years? Because the answer to these and other questions are unknown, it is best to not depend on using USB flash drives or other flash media as the sole long-term storage device for your digital photos or any other types of files. Flash media is generally thought of as temporary storage media, one that is used to transfer information from one device to another, but this may change in the future. If you want to use it anyways, make sure you have a second copy of your digital photos on stable media such as gold CD-Rs and to a lesser extend gold DVD-Rs. This strategy will protect against the loss of your information should the flash USB drive fail in the future.
Also note that the connector of the USB flash drive that is used to connect to the computer may also fail with repeated use. If this occurs then the flash drive cannot be used. This is also an issue to consider in the long term.