Toshiba F Series Service Manual page 24

42) Open the command prompt, execute the commands specified below, and add the SYSTEM and HIDDEN attributes
to the ¥GBSYSTEM.
attrib +S +H -R E:¥GBSYSTEM¥* /S /D
attrib +S +H -R E:¥GBSYSTEM
43) Close the command prompt.
44) Execute 27) to 29) above and remove the USB cable from the gigabeat F series.
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