Quick Upload
Upload files from any app that supports the standard share sheet. Target directories are remembered for different file types, so a photo and a .zip can have different default destinations and the next upload finds the right folder automatically.
Multiple files can be queued in one upload session, and entire directories can be uploaded by sharing folders from iCloud Drive in the Files app or from Working Copy.
Enable the ShellFish action by scrolling the colored list of icons in the share sheet to the left, picking More, and tapping Edit.