RAW is not regular file system type, usually the file system is FAT32, NTFS, etc. Luckly, there is a RAW file system recovery tool called M3 RAW Drive Recovery which can change file system RAW to NTFS without data loss. With M3 RAW Drive Recovery, you can easily chnage/convert RAW file system to NTFS without losing data.
Tips: Don't format the RAW drive before changing RAW file system to NTFS, otherwise, you will lose the data.
Change RAW file system to NTFS with RAW file system recovery software: M3 RAW Drive Recovery
Step 1: Install, launch M3 RAW Drive Recovery and then choose the RAW drive.
Step 2: Click Next to scan the RAW drive you want to change to NTFS.
Step 3: Explore the files in RAW drive before you change file system to NTFS.
Step 4: Click "Fix Drive" and then change RAW file system to NTFS.
It will take you several minutes to change RAW file system to NTFS. After that, you get all your data back, nothing lose. If RAW file system cannot be fixed, please switch to Data Recovery mode and then recover data from RAW file system drive.
After data recovery from RAW file system is successfully done, please try to reformat it, the RAW file system drive will be working again after the format completes.