Hi @ahmaddiab, you can do this as follows:
If you want to download media from the date 2021-09-26:
https://[kf_url]/api/v2/assets/[asset_uid]/data/?query={"$and":[{"_submission_time":{"$gte":"2021-09-26"}},{"_submission_time":{"$lt":"2021-09-27"}}]}
Then use DownThemAll from on that filtered set of data 
