I think you've conflated "wireless SSID" with "SSD" (abbreviation for "solid state drive").
An SSID is the name you give your wireless network.
An SSD is a solid state drive, which is basically a way faster hard drive due to a lack of moving parts like in a traditional IDE drive. They are the future, there will be fewer and fewer computers made with anything but SSDs as we move forward. If you've never used one, the performance gains are truly impressive, and the technology keeps getting better and faster.
That said, for streaming media across the home, or DVR work, you're not going to see the benefits of an SSD unless maybe you've got 4 or 5 streams running off the same SSD, and even then I'm not sure it would be a problem (though I admittedly haven't tried). The benefits of an SSD (and they are huge) are reduced load times for applications, but that's just not a big deal for a media server, because unless you're just severely underpowered, an IDE drive can handle serving up a media file just fine.
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