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Dmailer backup v2 comes now in its portable version, wich means that it can be run directly from any usb storage device with no installation at all. You can either choose the folders you want to backup or select the files by extension size or creation date. It is simple to use you just have to plug in you usb device and it will run inmediately. There are 11 languages available and you can try it out for free, besides it´s windows and mac compactible.

Portable backup software for mac