Ss-mai-017_s.7z.001 -

The file is the first part of a split compressed archive created using 7-Zip. The ".001" extension indicates that a large file or folder was divided into multiple smaller pieces (volumes) for easier storage or transmission . How to Open the File

To successfully extract the contents, you must have of the archive (e.g., .001, .002, .003, etc.) present in the same folder. How to Extract .7z.001 files - Microsoft Q&A SS-Mai-017_s.7z.001