Unable to unlock folder

[knp]

Hi
1- Why using knopix_5* ? Now somewhat very old.
However I also use some old versions by admitting
fewer functionnalities.

2- Your USB_drive may be "dirty" if formated with
"Fat_file_system" or "NTFS_file_system".
In such a case you may execute (inside Windows)
thecommand: chkdsk /f for "your partition letter:"
(reboot and re-do the same again (recommended).

3- If "knoppix_formated" I prefer execute "gParted"
which (sometimes) correct errors on the partitions.

4- I do not connect regularly

Good luck

knp