The HDD block is end of life and appears to be unavailable from everywhere. Even if it was available the last price I could find was £150 for 1TB, which is several times the price per TB for 2.5inch sata drives that don't have a plastic cover with proprietary connection.
As I'd like to have additional storage, but as I do not want extra cabling, I thought it was worth having a look inside. Whilst there is space for a 2.5inch drive in the case, there's no sata port on the motherboard, just the proprietary connection from the board to the connector used to attach the blocks.
The port must support power and data for the block, and I assume the HDD blocks actually contained a traditional HDD anyway, as it would be a mental and expensive product decision to do this any other way.
To my question; is there a cable Acer sells that allows this port on the board to be connected to a traditional 2.5" sata hdd? This could turn an abandoned product into something useful.