If you already have a folder on your PC/laptop that matches or only partially matches a library 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 libraries that you already have in your luckycloud account. Right-click on the corresponding library and select "Download and synchronize ".
A common source of error here is that users click into the corresponding folder (double-click). Please make sure that the corresponding folder is only marked. Otherwise, the entire library will be downloaded to a subfolder.
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