USB thumb drives speeds

Discussion in 'Mac Accessories' started by crazycat, Jul 19, 2008.

  1. crazycat macrumors 65816


    Dec 5, 2005
    I have found out something strange, i would use a USB thumb drive and i would see speeds of 15-20 MB/sec. After useing it for a few days it would drop to 4 MB/sec, now at this time i would get a new USB thumb drive and it will get speeds of 15-20 MB/sec. I have no idea why this happens, i am using a Kingston 4GB thumb drive.

    Does anyone have the same problem?
  2. crazycat thread starter macrumors 65816


    Dec 5, 2005
    In simpler words, does yoru thumb drive gets slower after using it a lot?
  3. CanadaRAM macrumors G5


    Oct 11, 2004
    On the Left Coast - Victoria BC Canada
    With any conventional flash memory, writing to a never-used area of the memory is fast.

    Changing existing data is slow however, because the Flash memory cannot simply change one bit, it must copy the whole block to RAM, change the one bit you want to change in RAM, erase the whole block, then write the whole block back to the Flash chip.

    So WRITING is fast but CHANGING is slow. If you want your speed back, reformat the memory card/stick

    For camera memory cards, make it a habit to copy your photos off your card to your computers hard drive, then reformat the card in the camera before starting your next shoot.
  4. sushi Moderator emeritus


    Jul 19, 2002
    Definitely good advice.

    If I might add, be sure to make a back up of your photos to CD/DVD immediately as well.

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