bappi.ar :
While insatlling windows 10 i converted my file system from MBR to GPT on one drive. All of my data got erased. How can I recover my data?
Conversion from MBR to GPT requires cleaning of the drive first.
Cleaning is data destructive - it deletes partition table from the drive and makes it to appear empty.
If you created new partition(s) and installed windows there, then overwritten data is lost and unrecoverable.
It may be possible to recover some data, that has not been overwritten yet. But I wouldn't put too much hope on that.