You can hide an individual photo from the Carousel iOS app or Android app, but you can not hide folders from the Carousel iOS app or Android app. You can easily restore your photo that you have hidden in Dropbox Carousel. Any photos and videos you have hidden using Carousel are stored in the "Hidden Photos & Videos" section of the Settings menu. You can restore your photo anytime when you want.
Quick Tip to Prevent Photo loss Nightmare with PicBackMan
In the case of losing irreplaceable memories like treasured family photos, it can even be heartbreaking. Luckily, with PicBackMan backing up your photos to multiple services and cloud accounts is easier than ever before. PicBackMan can save you from the absolute disaster of losing your photos by safely backing them up in one or more online accounts.