yeah just the first time when u stick it into ur controller. what its doing is its formatting the flash drive so that the xbox can recognize and utilize the memory thats on it.
thats why when u go to stick the flash drive into the PC after its been formatted, there may be some recognition problems with ur PC since the flashdrive is no longer formatted to work with the PC. thats when ur gonna need
this tut (if that problem occurs). later.
ps. make sure to thank zzk for the tut, lol.