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SanDisk 64GB SDXC - Cannot Format, Delete, or Add...

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Thanks Meter 1
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Default SanDisk 64GB SDXC - Cannot Format, Delete, or Add...

Hi all,

So my SD card recently kept unmounting itself from my phone, and I've been allowed to get a full refund as it's a known compatibility issue with SanDisk cards and S4.

The problem here is that I cannot format my card using most means (through PC, MAC, Phone, and DSLR). The card is currently using exFAT. It mounts to my system fine, I can see all files stored perfectly, although whenever I delete the files individually and remount my SD card, all the files appear again!!

Through PC, I have used Disk Management, EaseUS Partition Manager.
Through MAC, I've used Disk Utility, SD Card Formatter v3.

At the moment, i don't feel comfortable in sending it back, with personal data easily accessible.

Anyone have any other methods / ideas?

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