One of the most useful benefits from using your G-Suite account is the unlimited Google Drive cloud storage. Google Drive gives you an online folder where you can save, manage, and share files. All files will be reachable from any location with the internet. Files will also be updated across devices (called "synced").
Google Drive is strong against malware attack. So, you don't need to worry about computer virus. Google Drive also keeps files in the recycle bin in case you unintentionally deleted them.
Install a Google Drive Sync on your devices is optional and not necessary. Avoid synching if you have many gigabytes of files in the shared drive, or the data will fill up the space on your hard drive.