@gischpelino said in Oneplus 3/3T:

@Kyrylo looks like that not all partitons are ext4. May be a clean start with the device can help you. It gives you best chance to do it.

• start with twrp (fastboot boot twrp)
• set twrp to adb sideload mode
• adb sideload the latest oxygenos 9.0.6 from oneplus support page
• start the phone and make initial setup of the os
• after that 'fastboot boot twrp' again
• 1st. wipe all partitions
• 2nd select wipe advanced 'change filesystem' of cache, system and data and set it to ext4
• 3rd wipe format data
• check with twrp terminal command 'mount' that all partitions are ext4. If not change filesystem again.
• connect device to usb (still in twrp) and start ubport-installer

But this is not an op3 specific question!

Hey, just wanted to say thank you as this helped me get past an error during the automatic installer.