Official comment
@Cameron > @Etz is correct; the only supported export drive formats are FAT32 or HFS+ (Apple Extended (Journaled)). You can use any other format as a source for your audio, but you just can't export to it.
Hi there
I have recently had to use one of my DJ flash drives as boot media to install Windows Server 2019 on a new computer.
That was completed successfully and I now want to sync music back on to my USB drive
Using my laptop running up to date Windows 10, I deleted the volumes used for the boot media, set the partition style to GPT and added a new simple volume with exFAT formatting but rekordbox 6 will not show my USB in the Devices section or in the sync manager.
I tried using an MBR partition style with the exFAT file system but to no avail.

Please see below a screenshot from my disk manager showing the partition style and the volume formatting of the removable drive as well as the drive in Windows Explorer in the back
Please could you assist me to get the USB appearing in the Devices section of Rekordbox 6 so that I can sync music to it again?
Thank you in advance for your help.
Cam
@Cameron > @Etz is correct; the only supported export drive formats are FAT32 or HFS+ (Apple Extended (Journaled)). You can use any other format as a source for your audio, but you just can't export to it.
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As far as I know, none of the Pioneer DJ harware supports exFat, so even if you could make it visible to Rekordbox and export, it would not be usable on hardware.
I personally would recommend formating it to fat32 to assure interoperability.
Thanks for your responses guys! I must admit that I hastily assumed that exFAT was the same as FAT32 as I did not get the option to format FAT32 when formatting the USB. I'll look in to why that is but thanks for your help!
For larger USB sticks, Windows does not provid eoption to format them as Fat32,
but here are some tips how to achieve that:
https://www.howtogeek.com/316977/how-to-format-usb-drives-larger-than-32gb-with-fat32-on-windows/