Purging files store on NFS /S3

[John Wong]

Hi

I just looked at our disk usage on NFS server. We have used like 200G so far, and I wonder if there's a systematic way to purge files we don't need (or how do I know I don't need them)?

Similarly, if I were to replace NFS server with S3 instead, does the existing process (if any) work with S3?

Thanks.