GNU/Linux Mint 20 TP-Link Archer T3U Plus AC1300 Driver Setup – Step-by-step Guide
Hi! The linked Tutorial shows you Step-by-Step How to Install TP-Link Archer T3U Plus AC1300 USB Adapter Wireless Driver in GNU/Linux Mint 20.x Ulyana/Ulyssa/Uma/Una Desktop.
And the TP-Link Archer T3U Plus AC1300 Dongle make use of the Realtek rtl8822BU Chipset.
Especially relevant, in case to check your Adapter Chipset see: How to Check Wireless Device ID on GNU/Linux.
Installing Realtek rtl8822BU Driver in Mint