So after an export from Rekordbox to my USB stick (Corsair Flash Voyager GTX 512GB USB 3.1) it randomly stopped working, I got error "E-8307" on my Pioneer XDJ-RX2. Tried updating the firmware to latest version on the RX2, no luck. Tried reformatting it with macOS and Windows tools, no luck. I even attempted to update the firmware on the USB stick itself, but no luck.
What I had luck with was Gparted, a Linux-based disk tool. Easiest way to access this software is either to use a Linux-based computer (and installing Gparted using apt-get), or create a USB-stick (not the broken one, so you need a spare stick) that has a portable Debian-based OS on it, which you can boot into. This gives you access to Gparted and other useful tools to manipulate disks. See steps below for how I got the USB stick working again:
For a more comprehensive guide on making the bootable Gparted USB stick use this guide: https://www.partitionwizard.com/resizepartition/how-to-use-gparted.html. It covers step 1-5 below.
Steps:
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