Preventing a user from copying and storing files on a third party storage device or a user' s personal computer, by for example performing a process of connecting the authorized user to the company' s computer storage to access computer files for modification and, if the authorized user attempts to copy the file to the user' s computer or a third party storage site, determining whether the file should be copied, because the user is authorized and the file is of a type that can be copied, and does not include restricted data. To determine whether the file should be copied, the system may use inspection modules that inspect the data files to determine whether or not the user has been restricted from copying the data file. This may scan the file for restricted data, and determine whether particular users or groups are authorized to read and copy data such as personal social security numbers, bank account or credit card details, insurance or patient medical health records and test results.