These two questions are tied together : I export Slideshows of photos, accompanied by audio files pulled from iTunes Music, to an external hard drive and then re-import them to iTunes Movies so I can stream them to a TV via Apple TV.

The exports from Aperture seem to take forever : a 25 GB slideshow of 527 image files of around 20 MB each, plus audio of 31 minutes duration, took 5+ hours to get onto a Western Digital drive via USB 2.0. My Apple store told me the problem was the 2.0 and to buy a faster drive. I bought a WD with USB 3.0 and the next export still took “forever”. The Apple store then also told me two other things : 

a] Aperture’s native Slideshow export speed is simply too slow to go much faster and that the 2.0 vs. 3.0 was a “non-issue”. Is  this true or false ? Does the fault for the slow export belong to Aperture itself or to the drive’s transfer speed ? A graphic from Apple Support tells me 3.0 should be able to transfer at 5GBs/sec. vs. 2.0 at 480 MB/s; still, the 3.0 went no faster.

b] He also told me that putting audio files with the photos was the primary reason the transfer took so long, that audio files take much more space than photos. I thought visual files, either photos or videos, were the space hogs, not audio.

Can someone enlighten me on all these topics or confirm or deny the Apple Store’s info ?  Thank you very much.