There is a bug in firmware 1.10 that bricks the controller. DO NOT UPDATE THE RX3!!
XDJ-RX3 corrupt firmware 1.10
Once you do update, you'll be left with a controller that will not work. Turn it off and on again and it'll tell you to insert a USB stick into top USB1. And that's it. That's all you can do.
I contacted the store I bought mine from and they contacted PioneerDJ reps and support directly and I'm far from the only person to have this issue, so there is a bug in the firmware update.
How long it will take to fix I honestly don't know. I know it took an age to fix the DDJ 1000 drivers for the Mac Mini M1, though that was mostly down to Apple making a complete hash of the MIDI libraries in the rush to get the software out. Even when it was fixed, it still took Pioneer a good couple of weeks to sort out their end.
SO DO NOT UPDATE YOUR XDJ-RX3 just yet.
Pioneer XDJ RX3 Corrupt Firmware 1.0 to 1.10 Upgrade

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I◄◄⠀▐▐ ⠀►►I ───○ 02:05 / 04:10 ᴴᴰ ⚙ ❐ ⥂
Autism is a neuro-developmental condition characterised
by difficulties in social interaction and communication,
as well as restricted and repetitive behaviours or interests.
Oh the irony, PioneerDJ still have the corrupt firmware available for download.
https://www.pioneerdj.com/en/support/so ... m/xdj-rx3/
https://www.pioneerdj.com/en/support/so ... m/xdj-rx3/

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I◄◄⠀▐▐ ⠀►►I ───○ 02:05 / 04:10 ᴴᴰ ⚙ ❐ ⥂
Autism is a neuro-developmental condition characterised
by difficulties in social interaction and communication,
as well as restricted and repetitive behaviours or interests.