All of the links appear to be dead e.g. https://oceandata.sci.gsfc.nasa.gov/cgi/getfile/S3B_OL_1_EFR____20190625T011440_20190625T011559_20190626T061032_0078_027_017_1080_LN1_O_NT_002.zip
The equivalent S3A links work ok for me.
Welcome to the Earthdata Forum! Here, the scientific user community and subject matter experts from NASA Distributed Active Archive Centers (DAACs), and other contributors, discuss research needs, data, and data applications.