HD audio track playback
I'd appreciate any guidance you can give to clear up my uncertainties re playing HD music tracks downloaded to my laptop, on to a Naim Uniti, which will be the latest spec for the original Uniti. Presumably I can't just connect the two via a USB cable and play these tracks directly, so will have to use a USB flash drive? I'm not looking to use streaming or NAS yet, as I've only got one or two HD tracks, but this will probably increase once I've actually listened to proper HD music.
My laptop, an Asus X5DIJ series, has HD capabilities with Via HD Audiodeck, but no optical output, only USB, which I use to listen on my phones via my Fiio E7. Am I right in thinking that the HD audio files can be stored in their original form on my laptop, but only be played to the limit of my soundcard - 16 bit 44 (CD) or 48 (DVD) KHz?
This brings me to my next question - is there any need to use high speed drives? The data transfer rate during music playback won't be as high as during video playback, will it? And are there any recommended drives? I'm thinking of starting with a 16GB Sandisk Cruzer.