how to search a file in user desktop

1) i am in a company having 50 users.the users are downloding files
like mp3 and storeing it on the local HDD by different extensions,so
when we are searching the mp3 file we are not able to find it from
client.Now the users are asking for more storage space.how can we able
to know the content without opening the orginal file?is there any
solution for that?


2)some user have mp3 like files in there desktop and desktop in
non-shareable.instead of going to share the desktop of all users, is
there any way to contol or see the content of other user desktop items?



3)can administrator do this from his console?without going to client
machines?


guide me to solve this problem,i am fresher in this field.


Thank you very much
John


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