SketchUp 2017 was built for older environments, but it still runs well on modern machines with a few tweaks:

A "verified" version means the file hash matches the original release. If you are tech-savvy, look for the SHA-256 hash of the original 2017 installer online to compare it against your download. This ensures the file hasn't been bundled with malware. System Requirements & Compatibility

Once the 30 days expire, the Pro features (like CAD export or LayOut) disable themselves, and the software automatically reverts to the Free Make version for personal use. It does not stop working; it simply scales back to the core free features. Is It Still Safe to Use?

Your .skp files stay on your hard drive, not in a cloud you have to pay to expand.