We have moved to an LTO(4) tape backup system. It works great and now we have a stack of physical tapes lying around that need to be stored and ultimately secured. I was curious what options exist for storage containers that will not cause harm to the tapes? How many tapes should be stored together in such a container at a time? Does it protect against fire or water damage? Additionally, is there any consideration that needs to be made (in relation to storage of the tapes) for things such as PCI DSS compliance and the like?
Note: The obvious answer is to move the tapes to a safe and make sure that one has adequate off-site backups. This question is geared more towards lock boxes or other smaller such storage devices that can be used either stand alone or to be placed inside of a safe.