SUBZero
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SUBZero (Secure USB Backup Zero), a simple DIY wireless USB NAS (Network Attached Storage) that enables you to securely upload files on the go using a $10 Raspberry Pi Zero W! NAS is a low cost, convenient way to backup files, photos, and data for future use. The SUBZero was not intended to replace traditional USBs but offers features that you wouldn’t typically find on a COTS USB.