What I have
I have an old Acer Aspire A515-51G and I also have a desire to have a home server. In combination this creates a need for the laptop to carry more HDDs than it can from factory. Usually it can take one M.2 SSD and one 2.5" SATA drive.
What I want
I want to make the laptop able to run at least 4 HDDs in RAID 5 for storage and have one SSD as boot drive.
What I did
The buying phase
- 4 HDDs
- M.2 to SATA adapter
- 12V/5V SATA power converter
- 12V 10A power supply

The designing phase
I needed space to hold the HDDs, so I designed a 3D printed a cage to attach to the bottom of my laptop. Two 80mm fans can be attach to it. You can see it on printables. Also I remixed a tray (here is the original) so the HDDs can slide in and out of the cage.
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The assembly phase
A cutout at the bottom of the laptop was needed to give access to the SATA ports of the adapter.

I put a 2.5" SSD into the already present place for it in the laptop.
Then the cage was attached to the laptop, the HDDs were put in their trays, the trays inside the cage and the cables attached to the adapter and HDDs.



Do you have more photos of the actual connection process? Like before and after installing the adapter?
No, but installing the adapter itself is exactly the same as installing an M.2 SSD. Afterwards you treat it the same as regular SATA ports in a PC. You connect the SATA data cables to the HDDs and the adapter, and provide power to the HDDs. Power is not handled by the adapter, this is what the DC 12V/5V converter is for.
Does this help you?
It’s a good explanation. I don’t have a spare laptop to attempt such engineering madness, lol.