If the drive somehow was set to use only 32GB of its space, then that is the only place where data is stored. Anything you want from it should be in that space, with NO data stored elsewhere. So, can you access that 32 GB of files? Are the files you are seeking showing there? Are any files available from this drive?
You see, what I'm thinking is that it is just about impossible for the full 250 GB to have been used for file storage, and THEN have it converted to using only 32 GB but still have the other files there but inaccessible. IF it was limited to 32 GB, that very probably came first, not last.
Do you know about creating and managing Partitions on a hard drive? Do you know how to examine a HDD using Disk Management to see its total structure? If not, post here and we can give you some ways to examine and report what you find, WITHOUT risking damage to existing files.