Always run files from unofficial sources through a scanner like VirusTotal before opening.
Creators on Patreon often use this naming format for early-access releases of game modifications, 3D models, or software tools.
"TU" typically stands for "Title Update," commonly used in console or PC gaming to denote a specific patch.
If this file appeared unexpectedly, it is safest to delete it, as it may be a re-distributed file from a third-party site which can sometimes contain unwanted software.
Check your Patreon subscriptions or recent downloads from modding communities (like those found on Nexus Mods or CurseForge ) to see if it matches a project you follow.