Secure File Split - Version 1.10 Secure File Split is a piece of beautiful software for split large file to smaller files by bytes, kilo bytes, mega bytes. Join split files to the original file. Use Secure File Split to split files into pieces so that you can move them between systems on floppy disks, or email them out sharing with your friends over the Internet. Files can be split directly from Windows Explorer by right clicking on any file and selecting Split File. And support encrypt file to protect file content.