Some Android phones — including those made by Xiaomi (and its Redmi and Poco brands), Oppo, Realme, and OnePlus — have a setting called OTG connection that must be turned on before the phone will recognize an external drive like your Ultimate Backup. If this setting is off, the Ultimate Backup app won't detect your drive when you plug it in.
OTG (short for "On-The-Go") is the Android feature that lets your phone power and read a USB drive. Phones from Samsung, Google, Motorola, and most other manufacturers keep it on all the time, so this setting only applies to the brands listed above.
How to turn on OTG connection
On most of these phones you'll find the setting under Settings → Additional settings → OTG connection. If you don't see it there, open the Settings app and use the search bar at the top to search for OTG, then turn the setting on. Once it's enabled, open the Ultimate Backup app and connect your drive.
For a step-by-step walkthrough, follow along with the video for your phone's brand:
Xiaomi / Redmi
Poco
Oppo
Realme
OnePlus
Important: on these phones, OTG connection turns itself off automatically after about 10 minutes if no device is connected, so you'll need to turn it back on each time you want to run a backup. This behavior is built into the phone by its manufacturer and can't be changed by the Ultimate Backup app.
If your drive still isn't detected after turning on OTG connection, please reach out to one of our live support agents and we'll be happy to help.