@Froggy650 Hi, Is that USB disk a thumb drive that plugs directly into the router's USB port or is it a disk that is connected via an extension cable? In case the USB disk is connected via a cable,...

@Zombie- Hi, Could you please post a screenshot of the Firmware Upgrade page when it shows the error message?

@AlGor Hi, You might want to explain a bit more detailled what exactly the problem is that you are trying to solve. Otherwise people trying to help can only take guesses.

@MiguelCura Hi, The list you are looking for is here https://community.tp-link.com/en/home/forum/topic/644776 .

@fsdragon Hi, You might want to mention the region code of your RE450 V4 and whether you've got it supplied by your Internet provider or bought it at retail. The region code can be found on the...

@Madmex0075 Hi, If you have an Archer AX53 V1, then you can download and install the "Beta" firmware from this thread https://community.tp-link.com/en/home/forum/topic/593722 to get the VPN Client...