If your drive was originally formatted for Windows (NTFS), macOS can read it but cannot write or delete files. Installing the Paragon NTFS for Mac driver from Seagate US grants full read/write access without needing to reformat the drive.
Seagate software for Mac generally falls into two categories: (the modern management suite) and the Paragon NTFS Driver (for cross-platform compatibility). While Seagate hardware is often plug-and-play, the software is essential if you want to use a Windows-formatted drive on macOS without losing data. Seagate Toolkit for Mac seagate driver mac
While the drive will work without it, Seagate provides a suite called . This is likely what you were looking for when searching for a "driver." If your drive was originally formatted for Windows