We have created a policy for USB content control with size limit 50 mb.

Issue faced here is if i share file of 40 MB and another of 15 mb it get shared.

Use case is we want to restrict complete data transfer over 50 mb not file size

The file size limitation is enforced per file, not per session. What we are observing is the expected behavior by design. If your expectation is for Netskope to track the cumulative file size uploaded within a session , for example, a user uploads a 40 MB file at 10:00 AM and then another 15 MB file 15 seconds later, totaling over 50 MB , this functionality is currently not supported.