1toX is a utility that splits big files into multiple smaller files. With 1toX, you can create three different types of split files: simple data files (1TX), batch files (BAT), or executable files (EXE). Data splits require 1toX for rejoining, whereas batch and executable splits are self-rejoining. Both the data and the executable type splits allow you to require a password before rejoining. 1toX lets you choose the size of the split files, or it can set the size for you based on the amount of free space on the drive you select. To save space, 1toX can compress files to ZIP format before splitting. It supports drag-and-drop, and can format disks.