Teramind requires approximately 1 GB per 160 hours of data per screen at full quality & color recording, or 350 hours of black & white screen recordings at 70% scale.
If you use the Cloud deployment option, you don't need to worry about storage limits. We will cover up to 6 months of user sessions recordings. Other metadata such as logs, user data etc. will be kept for as long as the account is active.
You can find the storage specifications on the On-Premise Deployment Guide.