Hi @SeunghoKang
Slow performance could be due to slow network speed for the data transfer between client and server. If your data is huge and the connectivity is shared or via VPN you can experience extreme slowness. To improve it see if you can connect to a better network or get your client connection as close as possible to the data storage and server.
Since the SAS execution is happening on the remote server and what you see on the client is just the output, all the SAS libraries or data that you save will be on server storage. If you have any shared storage or network drive on server which can be shared on client, you should be able to access data seamlessly.
There are other options as well that you can use to download data like using sFTP, Download procedure which requires SAS/Connect, or using download option from SAS Studio.
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