Steps

In your workspace, open Files → All files.
Select New folder to group files by project.
Select Upload to add files to the folder you’re in.
Choose Star on a file to find it later under Starred.
Use the search bar to find any file by name.

All files in the TransferSize workspace with folders, files, sizes and sharing status

Share a file

Open a file, select Share, then New link. To share a folder, invite people by email under People. Manage links under Transfers → File links. Revoking a link never deletes the file.

Tidy up

Rename in bulk: Select several files and choose Rename. How it works.
Remove empty folders: In a folder’s ⋯ menu, choose Remove empty folders. They go to Trash.
Hide clutter from others: Choose Hide files from others… to keep files like drafts or *.tmp out of what people you share with see.

Next steps

My FilesKeep files in your account Rename many files at onceFind, replace and number Restore a deleted fileGet it back from Trash