Who This Is For
Beginner.
Think of it like a small storage locker instead of a full warehouse. Great for a few boxes you want off your desk, a bad idea for storing the entire contents of the house.
What You'll Build
A small NAS accessible over SMB with reliable mounts after every reboot.
Prerequisites
- Raspberry Pi 4 or newer
- Quality power supply
- USB 3 storage enclosure with an external SSD or HDD
- Gigabit Ethernet
Good Use Cases
- Small backup target
- Family document share
- Media staging area
Bad Use Cases
- Critical production storage
- Heavy database hosting
- Large multi-user storage
- RAID, without careful power and storage planning first
Install the OS
Raspberry Pi OS Lite is the lightest option; OpenMediaVault also runs fine on a Pi if you want its web UI.
Mount USB Storage by UUID
$sudo blkid
Add the resulting UUID to /etc/fstab rather than mounting by device name, which can change between boots.
Create Samba Shares
$sudo apt install samba
$sudo nano /etc/samba/smb.conf
$sudo nano /etc/samba/smb.conf
Disk Spin-Down Considerations
Some USB enclosures aggressively spin down disks, causing noticeable delay on first access, check the enclosure's power management settings if this becomes annoying.
Security & Backup Notes
- A Raspberry Pi NAS is not automatically a backup, and one USB disk is not resilient storage on its own
Troubleshooting
- USB drive disconnects, almost always insufficient power; use a powered enclosure or a better power supply
- Slow file transfers, benchmark with
iperf3and a real file copy before assuming the network is the bottleneck - Incorrect mount permissions, check the fstab mount options for uid/gid
- SD-card reliability issues, boot from the SD card but keep application data on the USB disk, not the SD card itself
Lab Finish Line
A small NAS accessible over SMB with reliable mounts after reboot.