[labyl]

To be specific, if the operating system of a disk can't be recognized, the state of storage device will become RAW. A RAW file system is a corrupt file system. At this time, no one is allowed to access any part of the partition/drive. That is to say, if you have been unable to access it all the time, You can neither see them nor transfer them to safe place, and all data originally saved in that "RAW" disk are lost. Devices that file system can become raw is hard drive partition, external hard drive, USB drive, SD card, memory card and other storage device.
Why RAW file system happens?

There are multiple reasons involved in making partition or Drive into RAW, the common reasons is:

1. Bad sectors
2. File system structural damage
3. Partition table corruption
4. Operating system reinstallation
5. Virus/malware attack
6. Improper partition access permission
7. Hardware problem
How to Quick Fix the Raw error?

If there is no important data on the raw disk, you can format it directly without concern, but if you have important data on it, you should recover them from the raw disk and then perform to format it.