Sandisk Ultra Dual USB 3.0 64G - what file format when it comes new?

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I received my Sandisk Ultra Dual USB 3.0 64G a few days ago.  However I am unable to access it on Windows 10. I received the following two prompts when I tried to access the USB:

  1. Microsoft Windows
    You need to format the disk in drive E: before you can use it. Do you want to format it? Format disk or Cancel.

  2. Location is not available
    E:\ is not accessible.
    The volume does not contain a recognized file system.
    Please make sure that all required file system drivers are loaded and that the volume is not corrupted. OK

I am not sure what is the problem but what is the default file format is on this USB disk?  FAT32, NTFS or extFAT?

If it is extFAT, will Windows 10, MacOS and Android be able to access this file format by default i.e. no need to install file format drivers?

And, is there any software tools I can use to repair this USB flash disk?

Appreciate if anyone here able to assist.

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New drives over 32GB are formated as exFAT, a Windows standard for at least a decade.  Vista, 7, 8, 10.  As to the Mac and Android OSs I don’t know.  Older OSs may not.

You have 2 choices imho, return the drive to the seller, or return it to SanDisk, for a replacement.

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