I felt it was important to note a few things about switching sources while presenting. Reading the files off an external drive turned out to be not as straightforward as one would think. However, during the review, I was in touch with Optoma and a firmware update is in the works to make things a lot easier.
One would expect to be able to switch from VGA to your USB drive and have the projectors file menu system pop up. It unfortunately does not auto sense as it should currently. I have included in this section some images to the right that demonstrate what the menu system looks like when you present from either the internal drive, the USB input or the MicroSD input.
Currently, I have had to turn off the projector, take out the media from any input that may be hooked up, then turn on the projector. Luckily the unit turns on and off very quickly. No long wait times like most projectors. A few seconds is really all it takes. Once the projector is on, you can then insert the media device. You should then see the internal menu system. If not, you will want to use the menu system to select the appropriate source.