Je suis un mignon petit Traquet rubicole
I wanted phylogenetic trees. I saw the phylip format, I don't even know what it is.The uncompressed data includes close to 5,000 files, for a total of about 4 Gb, it's not something that can be attached to an email.
If you have a relatively recent version of Windows (I assume you use Windows, otherwise the problem would not even occur), it seems you should be able to extract .tar.gz files without installing third-party software, using the command line -- see the first procedure described here. (I don't have a computer running Windows at hand to test if this really works, though.)
Most of it is genetic sequences (.phylip, .nex, .fasta files) and individual gene trees (.tre files). Can I ask what you want to do with it, exactly ? Is there a part of it in which you would be particularly interested ?
I downloaded 7-zip as recommended to me by The Fern. There are more than 3000 trees 😐