GNU/Linux Mint 19 TP-Link Archer T3U AC1300 Driver Setup – Step-by-step Guide
Hi! The linked Tutorial shows you Step-by-Step How to Install TP-Link Archer T3U AC1300 USB Adapter Wireless Driver in GNU/Linux Mint 19.x Tara/Tessa/Tina/Tricia Desktop.
And the TP-Link Archer T3U AC1300 Dongle make use of the Realtek rtl88x2BU Chipset.
Especially relevant, in case to check your Adapter Chipset see: How to Check Wireless Device ID on GNU/Linux.
Installing Realtek rtl88x2BU Driver in Mint