Heya friends
when it's wanted to share HDD space with others of your home network I would give Netgears Storage Central SC101 a chance:
http://www.netgear.com/products/details/SC101.php.
When looking for a storage device as a "data-carrier" which should be easy to use and handle I would check for a 2,5"-external HDD like Trekstor with the DataStation pocket x.u series offers:
http://www.trekstor.de/de/products/detail_hdd.php?pid=4. I like these "smallies" cause they don't need any extra power supply (powered by the USB connection cable) and they are handy compared with 3,5"-external devices.
If you have an old 3,5"- or 2,5"-HDD with 10 GB less I would buy a box which suites for that HDD. There are lot of vendors offering such boxes.
Greetz
BU