I wanted to replace my raspberry pi NAS solution I had running for two years.  Nothing was wrong with it, but I have been slowly moving everything to the NAS and from there to cloud backup, and wanted more flexibility to run docker containers.It was hard to find a fanless system with lots of hard drive bays.  This doesn't quite fit the bill, but it does have three bays, and with some velcro tape, two laptop HDD will fit into one bay.  It is an older system, but is more than capable of streaming movies from an Emby server while doing a cloud backup and running a bunch of docker containers.I don't remember exactly what the problem was, but I added a small SDD as a boot drive, but I couldn't get it to recognize the USB stick I was using to install the OS.  Mostly, it had to do with needing to coordinate BIOS/UEFI settings and the wording was a bit weird.  Once I had the OS, I've not had any problems at all.  It has Linux installed, and for giggles I installed Steam.  I wouldn't call this a gaming machine by any means, but for the games I play, it worked perfectly fine without interrupting its primary use as a NAS.The main problem is there is a slight rattle from a fan.  I will probably end up replacing the fan.  It isn't loud (like the HP800 SFF I have as my main desktop).  This is my third HP SFF computer, and all have had crappy fans that make it louder than it needs to be.  But, for the price, it is a good value.