If you use the EXPORT function in SAMPLE TRANSLATOR and set the format to RIFF WAVE you may export the individual constituent samples from a multisample one-by-one as WAV files). The .TXL file itself contains only the raw sample data. There are other associated files that must be included with the .TXL file if you wish to re-use it on the WK4 in the future. A .TXL without these associated files will not load at all.

If you just want to archive files on your PC then you don't need to change the format. Just leave the filenames and folder structure exactly as is and copy them to you PC's hard drive. You can also buy a 2.5" USB enclosure for around $100. This will let you connect the WK4's hard drive directly to your PC and drag the contents to another folder, CD-R etc.