Hi Naveen; Please note that this channel is for questions about the GoodData Platform product, and from your screenshot it looks like you are actually on GoodData Cloud (from what I checked, still on a trial, correct?)
GD Cloud does not support uploading from CSV files or Data Sources on S3 buckets, at this time. Please check the available data sources in the article
Connect Data.
P.S.: When checking our documentation, make sure to check on the top left corner for the product name, to ensure you are looking at GD Cloud content; It’s easy to accidentally check the features for GD Platform (such as S3 integration) instead! 🙂