I delete file`s that i still needed

Hi, you need try a data recovery tool like Cisdem Data Recovery for Mac or Recuva for Windows to recover the deleted files. You can follow the detailed guide to do that: How to Recover Deleted Files on Windows and Mac

Have you tried some data recovery software? You can use the Google search tool in this regard. .My Mac Book Pro hard drive has crashed and I'm in the process of replacing it. However, I had a lot of important data on that hard drive that he needs recovered. Then I found uflysoft data recovery software that recovers data from corrupt/bad hard drives. And fully supported for NTFS/FAT32 mac files.

Yes, it is possible to recover deleted files back form a USB drive, just like your player/recorder.
What you need is a deleted file data recovery freeware that could easily retrieve your deleted files back from this player/recorder:
http://blog4mark.blogspot.com/2012/12/deleted-files-recovery.html

One thing you should pay attention to is not to save anything new on this player/recorder before you've retrieved them all back.

If you want to retrieve files that were emptied from trash bin, you have to rely on the third party Mac trash recoverysoftware. It is compatible with all Mac operating system like Mac OS X v10.0, Mac OS X v10.1, Mac OS X v10.4, Mac OS X v10.5, Mac OS X v10.6, etc. Besides you can alsorecover trashon Windows.http://www.card-data-recovery.com/recover-trash.htmGet more information from this website.

You can't recover files that may have been permanently deleted, unless the device has a Recycle Bin like a desktop computer.However, there are certain devices that come with a .trashes folder where deleted files are stored. yuo can recover them through that.