1toX is a handy file splitter/zipper/emailer. Select file, files, folders from the Explorer or the interface. Any file(s) size, zip files before splitting, adds a CRC checksum, scans for free space, protects with a password, produces batch, exe (28 kb overhead), formats disks, supports drag drop, can rebuild pieces made by another software... Predefined sizes from notepad format (64000 bytes) to 2 Gb Jaz, new formats can be added on the fly.