The full version of FIFA 19 requires at least 50 GB of hard drive space. If the zip file you found is significantly smaller (e.g., only a few hundred megabytes or a few gigabytes), it is likely either incomplete, a "repack" that may be unstable, or a deceptive file containing malware.
If the file came from a site you don't recognize, it is safer to delete it. Trusted information regarding legacy EA titles can be found on the EA Help forums . File: FIFA 19.zip ...
Zip files are frequently used by scammers to hide malicious executable (.exe) files from email filters and security scanners. If the archive is password-protected , it is a major red flag; scammers often use passwords to prevent antivirus software from scanning the contents until you manually extract them. The full version of FIFA 19 requires at
If you have already downloaded the file, do not run any .exe files inside it yet. Upload the zip file to a service like VirusTotal to check it against dozens of different antivirus engines. Trusted information regarding legacy EA titles can be