Our Managed WordPress Hosting includes 2 GB storage / 50 GB data traffic and Managed WooCommerce Hosting includes 4 GB storage / 100 GB data traffic. 2 GB storage is more than sufficient for 90% / 95% websites. 4GB for most WooCommerce installations.
Data traffic means: the amount of files in MB / GB that visitors download with your package. The more visitors and larger/heavier the website, the more data traffic this generates.

Most of the time you will only go over storage when using IMAP email (IMAP is a mail setting that allows phone and computer synchronization, and stores everything on the server.). Even for websites with many photos that are not optimized for the web, 2 GB of storage can be tight. The same applies to websites with web shops or many products. But we can always make adjustments here.