With the ODROID-HC4, one can create a dual NAS setup without having to break the bank. Priced at US$65 with a plastic housing, the ODROID-HC4 supports two 2.5-inch or 3.5-inch drives and comes with other features, such as an IR receiver.
https://www.notebookcheck.net/ODROID-HC4-A-Raspberry-Pi-alternative-that-doubles-as-a-dual-NAS.498839.0.html