Sc23971-kbosv207.part4.rar -

: Compare the size of part4 to part1 . Multi-part archives (except for the very last part) should usually be the exact same size.

: To extract the contents of this file, you must have all previous parts (part1, part2, and part3) in the same folder. RAR archives cannot be opened or repaired if a single segment is missing. sc23971-KBOSv207.part4.rar

: Ensure you have downloaded parts 1 through 3. : Compare the size of part4 to part1

Based on the file naming convention, appears to be a segmented archive file for a high-detail Boston Logan International Airport (KBOS) scenery package for flight simulators (likely Microsoft Flight Simulator or Prepar3D). File Identification sc23971-KBOSv207.part4.rar