I guess what you really want to ask is how to recover data from an external hard drive without formatting it.
Different from standard file systems like NTFS and FAT, the RAW file system can’t be recognized or read by Windows. Therefore, you can’t access the RAW drives for storing or viewing files. In such a case , you can try using the CHKDSK command or reformat the disk.
Before seeking help from data recovery services, I suggest trying free data recovery tools first. You don’t need to incur any costs before your data is recovered. But if your hard drive is no longer recognized by the computer or has suffered physical damage, contact a professional data recovery service ASAP.