Hello.
Can you share your experience with me about recovery programs? Which one is more powerful and can recovery more files?

Thank you.

It really depends on the case. If you have to chose just one, I'd probably go with R-Studio. It's about the most universal and has a lot of features that others don't.

However in some circumstances others are better. For example if it's a FAT partition that's had some data overwritten, then GetDataBack might be better. If it's HFS+ then UFSExplorer or Data Rescue 4 will be better.

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Data Medics - Hard Drive, SSD, and RAID Data Recovery Service Company

You can always test more than one tool in trial mode on the same recovery, just be sure the drive (if it is one) will survive that or image it first.

According to our experience, UFS Explorer is the best one. So that's what we're using the most:
http://www.ufsexplorer.com/

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• Remote RAID, NAS, SAN, VMware, DVR (CCTV), flash and tape recovery. Data recovery support.

I want to recover an old pen drive. It is 2GB.
Unfortunately, the user overwrite data on it

If it's been completely overwritten (filled with new data) there is nothing to be done. Overwritten data is gone forever. Only God can recover it, maybe Jesus, but not data recovery software or even any data recovery lab.

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Data Medics - Hard Drive, SSD, and RAID Data Recovery Service Company

These guys should be able to help with recovery as well.

But hurry up – Marty will be here this evening!

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• Remote RAID, NAS, SAN, VMware, DVR (CCTV), flash and tape recovery. Data recovery support.