If you already have a folder on your PC/laptop that matches or only partially matches a directory from the luckycloud, you can Synchronize your data with each other without having to upload the same data again.
The client should then list all directories that you already have in your luckycloud account. Right-click on the corresponding directory and select "synchronize with local folder".
For files with the same name but different contents, so-called conflict files are created. In the linked description you will learn how such conflict files arise and how to solve them