Most of LCD Digital Signage based on RK3xxx series have already installed the software "IDSv6".
The quickest way to use "IDSv6" app is using the USB function to play the pictures or video in USB stick.
Step1. Quick click the corner 4~8 times to enter the info interface.
And again clicks will enter the main menu of IDS
Step2. Click the Online/Offline Button on Second row
Step3. Select Standalone mode
Choose USB Disk
Then choose right rotation for your screen 0/180 for honrzontal and 90/270 for vertical display
Step4 Click Ok to Main Menu and plug the USB stick
It shall enable play the media in USB stick now.
Note: the best resolution of picture or video shall be 1920*1080 or 1080*1920