Dmailer was a French company which specialized in portable backup and synchronization software for devices, including USB flash drives, memory cards, external hard disk drives, MP3 players, embedded phone memories, SIM cards and flash-based memory cards for mobile phones. It included 2 GB of free storage online through Dmailer Online, an online storage service that backed up secure copies to a remote server for access from any computer. Dmailer Backup v3 restores data to its original location or elsewhere and also performs customized backup.