FATX File System Limitations Reference

File name length limit: 42 characters
To get around this limit for games, convert it to a Games on Demand (GoD) package, which has a limit of 255 characters.

Path length limit: 250 characters, including path separators (\ or \\), excluding drive name and colon (X:)
To get around this limit for games, convert it to a Games on Demand (GoD) package, which has no path length limit.

File size limit: 4 GB (4,294,967,295 bytes)
It is impossible to get around this limit.

Folder item count limit: 4,096 subfiles/subfolders
Microsoft imposed this limit to prevent game developers from creating a folder structure that would be slow to load/search.
Due to a bug in the Xbox 360 kernel, it is possible to double this limit on JTAG/RGH consoles in conjunction with XL formatting: choose a 512 KB partition cluster size when formatting and the new limit will be 8,192.

File name characters: FATXplorer uses the same logic to validate file names that the Xbox and Xbox 360 does, so if a file name is rejected, it is being truthful.

File attributes
Xbox and Xbox 360 support different sets of file attributes. The Xbox 360 version of FATX cleaned up the unused/unnecessary attributes. The only noteworthy difference is that Xbox does make use of FILE_ATTRIBUTE_READONLY whereas Xbox 360 does not.

On Xbox: FILE_ATTRIBUTE_READONLY, FILE_ATTRIBUTE_HIDDEN, FILE_ATTRIBUTE_SYSTEM, FILE_ATTRIBUTE_DIRECTORY, FILE_ATTRIBUTE_ARCHIVE
On Xbox 360: FILE_ATTRIBUTE_HIDDEN, FILE_ATTRIBUTE_DIRECTORY

When updating files, FATXplorer will filter out any unsupported file attributes, so don’t worry if you use some software that is known to apply any unsupported ones.