Photoshop Quick Tip series.
The inbuilt generate feature for Photoshop is very useful.
You can export layers and folder quickly by simply using the correct naming syntax.

File Format
.png (Default value: png32 with semi-transparent alpha), .png8, .png24, .png32
.jpg (Default value: 9), .jpg(1-10), .jpg(1-100%)
.gif

File Sizing
200%
250×250
mm cm in

Folders
myFolder/HiRes/

Complex naming string Example.
200% myFolder/HiRes/Logo.png, 10mmx10mm myFolder/LowRes/Logo.png