Indicates that the file contains a sample or a "preview" version rather than the full set, often shared to give users a glimpse of the "exclusive" material.
Likely refers to a specific file hosting service or a user/uploader associated with the file. filedot to ls land 8 prev rar exclusive
Could be a custom script, batch renaming, or a Windows tool ( land , prev as in findstr /prev , rar a -ep1 ). Indicates that the file contains a sample or