Sg1510-ff1faa19ypc.part03.rar -

They are a common vector for hiding malware, trojans, or viruses.

Be extremely cautious when downloading split RAR files from unfamiliar sources: sg1510-FF1FAA19ypc.part03.rar

Scan all parts with updated antivirus software before extracting them. To help you figure out what this file is, let me know: did you find or download this file? Do you have the other numbered parts that go with it? They are a common vector for hiding malware,