Nextcloud installation help

Hi I am a noob to both Raspberry Pi 3 and Nextcloud. Tonight I followed instruction for beginners to set up Nextcloud on my Raspberry Pi 3. I got Nextcloud setup and working great. But I wanted to setup Nextcloud on my USB not the default installation method on my SD card where my OS is installed. My question is there a way to move my Nextcloud folders to run on my USB instead of my SD card? That way I can take the pressure off my SD card. If this is possible can someone help walk me through it I am a complete noob I just copied and pasted when setting up my NextCloud. Thanks!