I have that same MP3 player. It is a good MP3 player.
Do you have a Linux computer available? If not, then go to https://linuxmint.com/download.php and download one of the Linux distros (if you aren’t sure which, then download 32-bit Xfce). Now create a DVD from the file that you downloaded. Once you have done that, reboot the computer with the DVD in the drive, and boot to the DVD. Doing so will load a copy of Linux Live on your computer. (Nothing on your hard drive will be erased by doing this.)
Once you have logged into Linux Live, try to copy some music to your MP3 player.
The reason I suggest Linux is because sometimes Linux is better than Windows at reading and writing to a drive.
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