Where can I find my download on my Samsung S5?
Sweep! is a Windows only application. You can still download it from the official website under the Legacy Downloads.
Access the following link to download the software: http://www.wavget.com/download/legacy-downloads/
Here is a direct download URL: http://www.wavget.com/files/SweepInstall.exe
If you've downloaded the app on your Samsung, go to the standard file manager and locate the file in the Downloads directory.