How much storage does a website actually need?
Far less than you think: a normal website with dozens of pages and images fits comfortably in 5 to 10 gigabytes. Entry plans with 10 to 25 gigabytes are plenty for most sites. Only with lots of video or thousands of products does storage become a real criterion.
Web pages themselves are tiny; images and files are what add up. An average photo, properly sized for the web, weighs a few hundred kilobytes. Even with hundreds of photos you stay under a gigabyte. A WordPress install with a theme and plugins lands at a few hundred megabytes, and a mailbox usually grows faster than the site itself.
Marketing slogans about unlimited storage sound attractive but are irrelevant for a normal site. What matters more is the type of storage: modern NVMe or SSD drives make your site noticeably faster than old-fashioned disks; Hostinger and A2 Hosting lead with that in their plans.
The exceptions are real: if you host your own video (do not; use YouTube or Vimeo), run a photo archive, or sell thousands of products, then check the numbers. Everyone else: choose on speed and service, not gigabytes.