someone help me.
Well First It said Device or resource busy but then It removed automatically. I guess it is removed when resources became available. Workspace is fine now
@vipulkrishna Google is your best friend. https://unix.stackexchange.com/questions/11238/how-to-get-over-device-or-resource-busy Refer this for why it happens and how you can solve it.
But what is big nfs files why are they are being created again and again?