Can't Write to SD Card

Hi! I have a Sprint LS992 LG G5. I have a 200 GB SD Card. I can't save any files to my phone via the SD Card nor write anything to the SD Card. If I try to download something to the SD Card or have an app write to the SD Card, it will error out. I can, however, transfer files from computer to the SD Card. Is there a possible other pathway in the file explorer to access the SD Card? Currently, using Solid Explorer, my SD Card sits on /storage/BBF5-E792. Any thoughts?

Thanks!