Since you are dealing with a fragmented archive file like "Gran-Turismo-6----All-DLC--BCES01893.part3", you are likely looking at a community-preserved version of the 2013 racing sim. Specifically, BCES01893 is the European region code for the game Gran Turismo 6 - Wikipedia.
Tips and Tricks
file to the root of a FAT32-formatted USB drive or transfer it via FTP to the /dev_hdd0/packages folder on your PS3. Install via Package Manager : On your PS3 XMB, navigate to Package Manager Install Package Files and select the DLC file. Game Updates : Ensure your Gran Turismo 6 Gran-Turismo-6----All-DLC--BCES01893.part3
While "All DLC" for GT6 is often used interchangeably with "All Updates," the specific content typically found in such a package includes: 1. Vision Gran Turismo (Vision GT) Since you are dealing with a fragmented archive