The number of tapes a company would have in offsite storage really depends on how they manage their data. (slaw.ca)
Assist record management in providing records management guidance and training responsible for managing daily offsite storage of records and contract renewal (bestresumewriting.com)
The master tape is retained in a secure offsite storage facility and then destroyed in accordance with applicable NARA retention schedule N1 -557-05-07 Item # 1. (transportation.gov)