Email Storage for Business Explained: How Much Do You Need?

"How much email storage do we need?" is one of the most common questions when choosing a provider - and one of the easiest to get wrong. Buy too little and inboxes fill up; buy too much and you overpay. Here is how to think about it clearly.

What actually uses your storage

Most of your mailbox space is not text - it is attachments. PDFs, images, spreadsheets and the endless "please find attached" threads add up fast. Other culprits include:

Large sent items (you keep a copy of everything you send)
Newsletters and marketing mail
Shared mailboxes that receive high volumes
Old threads no one ever deletes

A simple rule of thumb

For a typical business user:

Light users (mostly text, few attachments) are comfortable with around 10 GB.
Average users doing normal day-to-day business are well served by around 50 GB.
Heavy users - sales, support, finance, or anyone drowning in attachments - benefit from scalable storage that can grow.

The right plan matches storage to how people actually work, rather than a one-size-fits-all number.

Per-mailbox, not shared pools

Look for per-mailbox storage so a couple of heavy users cannot starve everyone else. With DigiCloudMail, each mailbox gets its own space, and you can scale up individual mailboxes as needs change - no disruptive migrations.

How to keep storage under control

Archive or delete old newsletters and automated mail
Use shared drives for very large files instead of emailing them
Set sensible retention on high-volume shared mailboxes
Review storage from the admin panel and top up only where needed

Do not trade storage for safety

Cheap plans sometimes cut storage and backups together. Make sure your provider includes daily backups regardless of storage size, so freeing up space never means losing history. We cover this in daily backups and recovery.

The bottom line

Right-size your storage to your team, choose per-mailbox allocation you can scale, and never sacrifice backups to save a few gigabytes. Done right, storage is something you set once and rarely think about again.

Not sure what storage your team needs? Talk to us and we will recommend the right plan.