Issues with updating or downloading

By being unable to update a beatmap, potentially important fixes can easily be missed out on. This mostly affects players who download the map in qualified, as it is more visible to the public while not necessarily being in its final version.

The name of the file seems to determine how osu initially checks the map for updates. This is then presumably stored in some local database because deleting and re-downloading doesn't seem to affect it. So if you already had the map when the file name was correct, it may properly update for you while showing "not submitted" for others downloading it for the first time.

For Windows 10 users, file paths longer than 260 characters cannot properly be unzipped by the game and simply vanish instead. This varies between users based on where on their computer they put osu!, but for the sake of consistency, we'll simply arbitrarily make 130 characters the limit.

A file name longer than 130 characters, caused by a combination of a long title and a long difficulty name.

Outcomes

Wrong Format
"file name" should be named "artist - title (creator) [version].osu" to receive updates.
Cause: A .osu file is not named after the mentioned format using its respective properties.

Too Long Name
"path" has a file name longer than 130 characters (length), which causes the .osz to fail to unzip for some users. Consider truncating the artist, title, and/or difficulty name fields where it makes sense to do so.
Cause: A .osu file has a file name longer than 130 characters.

Hitsound difficulty present Unused files

Table of contents

Issues with updating or downloading

Purpose

Reasoning

Outcomes