How to fix the "USB device not recognized"in Up Studio?

It is caused by the outdated driver. You need to reinstall the driver for the printer.

1. 去UP Studio pageand download the matching Driver File to your computer system.
2. Copy the directory path in which the downloaded driver file is located.
3. 去your computer, right clickMy Computer, selectManage, clickDevice Manager, findOther devices, right clickUnknown Devices,clickUpdate Driver Software,选择Browse my computer for driver software, paste the driver file’s directory which you just copied, and then clickNextto finished the installation.

After the installation, the UP Studio should be able to recognize the printer.