time on the Xbox. Xbox hard drive file system (FATX) has many limitations, among them a maximum file name length of 42 characters. The Xbox has four non-standard USB ports but the Xbox SDK does not contain a full USB stack, thus to add support for USB hardware devices, the developer would have to code the entire USB stack from scratch. XDK and Xbox specific software limitations This is a list of XDK, Xbox hardware, and Xbox operating system specific limitations. UDF (Universal Disk Format) file system limitation: The Xbox only supports UDF version 1.02 (designed for DVD-Video), which has a maximum file size of 1 GB (Gigabyte) (a DVD in a newer UDF version with a video that is larger than 1GB will not play), with the same applying to UDF/ISO hybrid formats (a.k.a. UDF Bridge format). A workaround is to burn discs in the ISO 9660 format. The ISO 9660 format has a 2 GB maximum file size, which cannot be bypassed. The Xbox hard disk is formatted in FATX (File Allocation Table for Xbox) which has a 4 GB (4096 Megabyte) maximum file size, and only supports file/folder names up to 42 characters, a maximum of 255 character full path, and a maximum number of 4096 files/folders in a single folder, plus in the root of each partition, the maximum number of files/folders is 256. FATX also does not support all standard ASCII characters in file/folder names (for example < > = ? : ; " * +, / \|¤ &). The USB flash drive reader/writer class used by the Xbox operating system has a few limitations as well. It is limited to USB flash drives and hard disks compatible with USB Mass Storage Device Class following the USB 1.1 standard, with a maximum size of 4 GB. It can read and write to FATX formatted flash drives, but can only read FAT12, FAT16 (including VFAT), and FAT32. NTFS formatted drives are not supported yet. With its 733 MHz Intel Pentium III-like CPU and 64 MB shared memory, the Xbox has neither a fast enough CPU nor sufficient RAM to play HDTV videos encoded in native 720p/1080i resolution. However, the Xbox can upscale all standard definition movies and output them at 720p or 1080i. See also XNA Game Studio for Windows and Xbox 360 References Microsoft development tools Development Kit Software development kits