While performing firmware update all data will be erased !
See the manual on page 36:
Vosonic VP8870 manual
The firmware update for the player is PMP.VP8870-1.0.0.B2.mtg :
Since you've downloaded the zip file, were you able to unpack it with
Winzip op Winrar ?
When using XP you can unpack by:
1. [Right click on the zip file] Open with > Compressed maps [left click on Compressed maps]
2. The next screen shows the opened zip file. On the left side the
folder task manager can be opened ( Folders / Maps in the top bar not selected): "Unzip all files" : follow up the Windows unzip wizard and
remember the location of the files.
How to do the firmware update is explained in the pdf file "How to update 1.0.0-B2 - VP8870 .pdf", added to the firmware update in the
zip file.
Remember:
While performing firmware update all data will be erased !