Normally I recommend Sandisk and I still do, but not the 64GB SDXC anymore. On the card packaging it is written “not intended for sale in the U.S.” And “No warranty” for this market! So … probably Sandisk thinks it’s good for the REST of the world.Īh, after all these years I find that the problem is with this actual product. Obviously, it is a physical defect that requires redesigning this type of card and withdrawing existing ones from the market. Under these conditions, I can say that there is a lack of respect for customers from SANDISK. I even tried the diskpart command to change the card attributes … The card has exactly the same behavior in Windows, in Android phone, or in Canon camera. Any changes to the card content are blocked, but reading can be done. I’ve tried many softwares (including SD Card Formater from SD org recommended here). Same symptoms: it can not be written on either (neither move, nor delete, nor format, nor low-level formatting, no change to the partition type …). I bought 3 in the last 2 years, without really informing / documenting the problems of Sandisk cards very seriously before. I find it is now 5 years since this card type (micro sdxc 64GB) is causing problems. Get the free format software from the SD Card Association! Im using a $210 HP laptop with AMD A6 9220 processor/Windows10 Home build 1709, which will apparently read and write to the card fine but comes up short if at some point you decide to wipe it clean and reformat. I down loaded the free formatter, popped the card in and it immediately recognized it as a 200Gb xFAT 128Kb Byte size card. I didnt even know there was an SD Association. One of the suggestions was to download the SD formatter from the SD Card Association. Then I googled the problem and ended up on this thread. I tried formating on several machines using every format I could and even using “restore defaults” with no luck. It worked in everything i put it in except at some point it started reading 31.8Gb instead of the 183Gb that it originally started out with. Then I put it in a cheap $10 USB Made in China adabter/read/writer in both micro and Adapter mode. It worked great for awhile, while trying it in several laptops in micro and with adpapter modes. Just purchased SanDisk Ultra PLUS micro SDXC UHS-1card with adapter 200Gb up to 100MB/s for $79 from WalMart.
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