Once you connect it to the PC while on recovery mode it will be recognized as 16MB format drive. Inside that drive will be a file “Version.SDK”. You will find the version number there.
Much simplier step is to check the back part of the Sansa bottom right if it says e250 or e250R.
http://forums.sandisk.com/t5/User-guides-Firmware-Software/Sansa-Firmware-Thread/td-p/185348
If updating the Firmware does not work, create a folder inside 16mb format drive and rename the folder to Sansa.fmt. Note that this will do a force format on the device erasing all files once you unplug it.
