: This refers to a defunct or niche file-sharing/hosting site (X-S.net) where these archives were historically hosted for download.
The string appears to be a specific file metadata tag or a download description typically associated with adult content or private photography archives. Breakdown of the Content Galitsin / Grigori Galitsyn : Grigori Galitsyn : This refers to a defunct or niche
The "helpful feature" you are looking for likely refers to the specific characteristics of Galitsin's work or the functional features of his digital releases: Features of Galitsin's Work : This refers to a defunct or niche