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Thread: Sucessfully converting a Class 10 64gb MicroSd to NTFS or Fat32

  1. #1
    Ratchet
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    Sucessfully converting a Class 10 64gb MicroSd to NTFS or Fat32

    Hi:

    Class 10 64gb MicroSD cards come formatted as exfat and as it turns out, a hidden partition. This leads to easy corruption and difficult conversion. I recommend class 6 64gb MicroSD cards. They're getting hard to find but I've purchased several for my Android tablets from this ebay vendor:
    http://www.ebay.com/itm/280843443195...84.m1497.l2649

    I ended up with one class 10 64gb Microsd card through a dispute. I found the solution in the XDA Samsung Gaaxy S3 forum in the following thread:
    Samsung Galaxy S III I9300, I9305 > Galaxy S III Accessories > 32GB or 64GB MicroSD cards for Galaxy S3.
    32GB or 64GB MicroSD cards for Galaxy S3 - Page 6 - xda-developers


    The first post outlines the problem and continues with a complex solution using windows 7:
    "IF OWN THIS SANDISK 32GB OR 64GB C10 UHS-I AND YOU ARE HAVING ISSUES WITH THIS CARD OR IF YOU WANT TO RECLAIM YOUR 16MB BACK SEE THIS POST!

    This applies to the SanDisk Mobile Ultra 30MB/s 32GB or 64GB Class 10 UHS-I cards (the Class 6 cards did not have this issue (I believe)
    To everyone - you may have a problem with this SanDisk C10 card in your Android device (especially the Galaxy 7.7 and S2).
    Not because its C10, not because its UHS-I, but because of SanDisk's making 2 partitions.
    edit: it may be that both the 32GB and 64GB C10 cards both have 2 partitions. you may have to do this for the 32GB C10 card also.

    The old 64GB C6 card just had 1 partition, one large 59.48GB (after format) drive" You'll find the more complex method in this thread.

    In the same thread another user suggested the free windows program: MiniTool Partition Wizard Home Edition.
    MiniTool Partition Wizard Home Edition - CNET Download.com

    It allows you to delete the sd partition, zero it out, re-create the partition in either Fat32 or NTFS, format and you're good to go. Make sure you have the sd card partition selected or you could nuke your computer.

    I was able to convert the card to NTFS and see it recognized in my Asus TF201 tablet. My Galaxy s3 couldn't see the card as NTFS so I then deleted the partition and re-created it as Fat32. For those who need to use Fat32 for rooting or prefer NTFS, like me, MiniTool Partition Wizard Home Edition works.

    I'm not a fan of exfat and didn't test putting Humpty Dumpty back together again but I assume it could be reformatted to exfat if one wished. I'm still sticking to class 6 cards.

    Best,

    Tom
    Jeffrey and Frederuco like this.
    32gb Transformer 101 & 201 with dock
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  2. #2
    Jazz
    Member #
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    BTW, I bought one of these new cards, and after using MiniTool, my TF201 still would not read it. I put it in my Bionic, and it's fine, and the "old" Class 6 (???) that was in my bionic works fine in my TF201. I think ASUS needs to look at their microSD card code a bit, as something seems just a bit flaky there. (I also swapped them back, and still no joy)

 

 

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