This is the simplest solution. You need just the mSata SSD.

SSD disk Kingston KC600 512GB mSATA

For this variant, you need an mSata-m.2 adapter and m.2 SATA SSD with key B or key B+M.

An m.2 SATA SSD with key B+M.

WD Blue™ SATA SSD M.2 2280

Plextor M6G-2280

Delock 62592 - Adapter mSATA > M.2 Key B slot

• Interface: SATA
• Supports M.2 modules in format 2280, 2260, 2242 and 2230 with key B or key B+M based on SATA

Delock 64109 - Adapter mSATA to M.2 Key B slot

• Interface: SATA
• Supports M.2 modules in format 2280, 2260 and 2242 with key B or key B+M based on SATA

This solution allows using up to 2 SATA disks.

You need:

1. Mini PCIe 2xSATA 6 Gb/s
2. Power cable for the disk
3. Disks (SSD or HDD)

Delock 95260 - Mini PCIe I/O PCIe half size 2 x SATA 6 Gb/s

Delock 95233 - Mini PCIe I/O PCIe full size 2 x SATA 6 Gb/s

Power Supply Cable for SATA disks can be connected to the Turris Omnia board and it's not a standard one. It consists of five wires.

Power cable pinout on the board

Cable discussions in Turris Forum:

• https://forum.turris.cz/t/pci-sata-controller-hdds-wont-spin/4296
• https://forum.turris.cz/t/hdd-power-cable/1370/5

Cable images

Power Supply Connector on Turris Omnia board.

Shop

https://www.moddiy.com/products/2.54mm-5%252dPin-Female-to-2x-SATA-%252b-3%252dPin-Fan-Power-Cable-Adapter.html