The 88flash_drive_mod.zip file you have requested: Clear Sky / Mods / Singleplayer / Flash Drive Mod - 321.26kb is not available. Perhaps try browsing all files for the game S.T.A.L.K.E.R.: Clear Sky and upload any files you want to share or are missing. This is the only information we could locate:
A flash drive mod, get them at the start of a new game off the Clear Sky trader. Gives you 10,000 RU to start off with as well.