Downloading file to device

I have a S9 device, with nextcloud installed. I go to download a file, and it is successful. I try to locate it on my device, but can’t find it. Yet in Nextcloud, the app shows a green check mark on the photo. Also, “On device” shows it when I drill down into the folder containing the image. Are the files downloaded to local storage when you click on the “Download” option?

Yes, it is downloaded to your device. Check-out the default storage path which has been set in the app settings to find all stored files.