You can use “Copy to” way in Cloud Explore to transfer part files: open the cloud, select files you need to transfer, right click, then select "Copy to". If all files you want to transfer in same folder, you can use the Cloud Sync feature. So, it will copy all files in the folder to the destination.
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If all files you want to transfer in same folder, you can use the Cloud Sync feature. So, it will copy all files in the folder to the destination.