calli, try this:
Open the HumViewer software
Insert your SD card in the reader
At the top left of the HumViewer screen, click on "file"
Select "OPEN"
When the next panel appears, select "computer" and then the drive that has the SD card inserted into.
If you have snapshots and recording on the card, select "RECORD"
You will see one or more files with a R000(some number).DAT
Click on a file name to highlight it, and select "open" at the bottom of the panel.
The software will start loading the file and when that stops, click on the "play" box on the top right of the HumViewer panel. You can select what view to see the recording and change the color, brightness, contrast.
The speed of the playback can be adjusted by changing the number beside the "play" box.
You do not have to transfer the files from the SD card for HumViewer to read them.