Here is a Raspberry Pi case that lets you build your own NAS. The Argon EON Pi NAS Case has a multi-function power button with a programmable OLED display that shows IP address, CPU/storage status. It has 4-bay STA hard drive ports and can also handle 2.5-inch HDDs.
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This case has a real-time clock for scheduling. All the ports are one side for easy cable management.
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