Since version 1.1.7 folder upload is available.

Android and iOS are awaiting release and going to be approved later today.

Desktop clients are immediately available: https://s3drive.app/desktop

Folder upload for Web will have to be addressed separately (please vote if you're interested): https://s3drive.canny.io/feature-requests/p/add-support-for-folder-upload-web

This task originally included folder ZIP download which was moved out to separate issue (please vote if you're interested): https://s3drive.canny.io/feature-requests/p/add-support-for-folder-zip-download

Thank you for voting on this issue and I hope that you'll enjoy this new feature !