Uploading folders is extremely useful when you are going to upload large amounts of files.
This feature is supported only with Google Chrome or Mozilla Firefox.
Step 4: Name your Project
After you have dragged files/directories, you will be moved to the upload page. The "Import" will upload all files and directories recursively.
Do not close the browser tab during the upload process
You have to define Project name and click "Start import".
Step 5: Wait until the task is completed
You will be moved to the "Task status" page. It also has a progress bar. A new project will be added when the import process is finished.
At this stage import adds all the necessary information to the database, checks files hashes and uploads only unique files. Also it generates small and optimized versions of each image for previews and icons.