The USB disk prompts for formatting, but I dare not format it. After formatting, it prompts that it cannot be formatted.
First of all, we have to make it clear that such a USB flash drive is salvageable, and the contents of the USB flash drive are also recoverable.
Operation steps:
1. Recover data
Insert the USB flash drive. Use a tool called EaseUS Data Recovery. Domestic and free. And only for use in mainland China.

Click Partition Recovery and select the USB drive you want to recover. Then the next step is to follow the prompts and keep going. Finally, the directory will be rebuilt, and then you can select the files you want to restore. Support preview. No more nonsense. Wait for the recovery to complete before proceeding to the next step.
2. Recover USB flash drive
First download a software called USBBoot, or DiskGenius, find your USB flash drive, and make it a USB-HDD boot disk. You will be prompted to re-insert and unplug the USB flash drive, so re-plug and unplug it. Then you will find that the system has recognized the USB flash drive. At this time, the partition will have less space. Use the USB flash drive tool to initialize the USB flash drive. Then you will find that the lost space has been recovered.
When you see this, you are done. Do you doubt that the above two steps can solve the problem of the U disk being unable to format and display Raw? Yes, only the above two steps can solve it. There are many tutorials about this on the Internet, but few are practical and the steps are always too complicated. It is better to try the above simple steps and solve them with skills to achieve twice the result with half the effort.