According to FiiO, the update from FW2.0 to FW3.3.0 brought:
The device will likely reboot itself. The first boot takes longer than usual (up to 90 seconds). Once you see the home screen:
Another point of confusion is the device's internal storage. Some X7 consoles format an inserted microSD card in a non-standard way (like 2GB FAT), which can cause a boot loop with larger capacity cards. A community workaround involves partitioning the card to a smaller size (e.g., 4GB FAT) to avoid the boot issue. x7 handheld firmware
Power off the device and connect it to a PC while holding the button to enter upgrade mode.
Even with the best preparation, things can go wrong. Here are quick fixes for common X7 firmware hiccups: According to FiiO, the update from FW2
For the X7 handheld, the firmware determines:
Updating the X7 handheld firmware offers several benefits, including: Some X7 consoles format an inserted microSD card
Usually features a 4.3-inch screen and a basic Action Chipset.