https://github.com/TriForceX/MiyooCFW/wiki/Custom-Firmware-Setup
PowKiddy Q90-V90 (Download)
- You need to remove all partitions of SD card using: Partition Wizard or SD Card Formatter
- If the CFW file is compressed on .7zip just extract using 7zip before proceeding
- Execute Win32DiskImager, select SD card, load the .IMG file and press Write button to proceed.
- Once the image is burned on the SD card, open Partition Wizard and choose Disk Management.
- Then right click on the "main" partition and choose extend (Set it to the maximum) and apply.
- Insert the SD into your console and turn it on. If it boots it is a success.