MicroSD slowing down after several hundred MB

Discussion in '3DS - Console, Accessories and Hardware' started by wurstpistole, May 29, 2016.

  1. wurstpistole
    OP

    wurstpistole N3DS B9S

    Member
    2,668
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    Nov 19, 2015
    Gambia, The
    Hi there,

    got a strange problem with my SanDisk microSD. It is a genuine Sandisk Ultra 64GB, formatted to FAT32 with 32K Cluster Size. I bought it in December.

    At first everything went smooth but then it got really slow, like taking over an hour to dump NAND - which took 10 minutes at the beginning. I then backed up contents and Emunand, and reformatted it. Afterwards it worked better but now it is like that, that it begins to slow down after it has written around 600-700MB. So, say I install a Game of 2GB, it works normally fast until it reaches 700MB and then it gets really, really slow, like 1MB in 10 seconds, so that installing that 2GB game takes up to 2 hours where it only took like 25 or 30 minutes at first.

    What can it be? Is there anything maintenance-wise I could do? Defrag the card? Format again? Deep Level Format? Something like that? Any help is appreciated!

    Otherwise I'll probably just report it as defective, return it and get a new one / different brand. Recommendations here?
     
    Last edited by wurstpistole, May 29, 2016
  2. wurstpistole
    OP

    wurstpistole N3DS B9S

    Member
    2,668
    972
    Nov 19, 2015
    Gambia, The
    Via free shop I found out that it slows down to exactly 20kb/s after around 900 to 1000mb. I'll try reformatting once again and if its still that bad, I'll return the card and get a SanDisk extreme or maybe a different brand.