Drive Add-on Pricing & Plans

The Drive Add-on is an optional subscription that expands your TrekMail storage pool. You pick a size, you pick a billing period, and the bytes stack on top of whatever your plan already includes — no migration, no separate Drive product, no separate login.

This guide covers the price ladder, the billing options, the currencies, and how to think about which size is right for you.

What you get

The Add-on adds GB to your account-wide storage pool. The pool is shared by email, mailbox files, and account files — see Pooled Storage Quotas Explained for the full accounting.

Whatever size you pick is added to your plan's base storage. A Pro account on 50 GB plus a 5 TB Drive Add-on has 5,050 GB of pool, period. There's no separate "Drive only" capacity that competes with email — the Add-on is generic storage capacity that anything in your account can use.

The Add-on is independent of your mail plan. A Starter account can buy 100 TB; an Agency account can stay on the included 200 GB. You can buy the Add-on, resize it, or cancel it without touching your mail subscription.

The price ladder

Nine snap-point sizes are available, from 250 GB up to 100 TB. Beyond that, contact sales for a custom quote.

USD pricing:

The yearly column is the monthly price × 12 with a 17% discount built in — roughly two months free. If you're confident you'll need the storage for at least eight months, yearly almost always wins on cost.

Currencies

The Add-on is priced in 10 currencies. The slider on the Plans page shows your local pricing automatically:

• USD — United States dollar
• EUR — euro
• GBP — British pound
• CAD — Canadian dollar
• AUD — Australian dollar
• JPY — Japanese yen
• CHF — Swiss franc
• KRW — South Korean won
• SGD — Singapore dollar
• AED — UAE dirham

Once you subscribe in a given currency, that currency is locked for your subscription. You can't change a USD subscription to EUR mid-flight; if you need to switch currencies, cancel the existing subscription and start a new one in the new currency. This is a Stripe limitation, not ours.

The 17% annual discount applies in every currency. The savings work out to roughly two months free regardless of which currency you pay in.

Above 100 TB

The slider stops at 100 TB. Accounts with genuine multi-petabyte needs are rare and we'd rather have a real conversation than auto-bill someone for a tier that may not actually fit their workflow.

If you need more than 100 TB, contact our sales team. We can usually arrange custom pricing, dedicated infrastructure, or a hybrid setup — depending on what you actually need. Hard cap is 1 PB per account at the platform level.

Picking the right size

A rough guide:

• 250 GB — solo or small team that sends the occasional large file via download link.
• 500 GB to 1 TB — small team sharing brand assets across mailboxes and replacing email attachments with download links regularly.
• 2 TB to 5 TB — multiple clients, multiple shared folders, regular large file deliveries (video, design, photos).
• 10 TB and up — bulk archives, high-volume file delivery, or using Drive as primary storage.

The Add-on is easy to resize — start small and bump up if you fill it. There's no penalty for adjusting except a couple of clicks.

How resizing works

In Billing, click the Drive Add-on row to open its detail page. There's a slider showing your current size; drag it to a new tier and confirm.

Upgrades are immediate. Click confirm, the new capacity is available within a minute, and you're charged the prorated difference for the rest of the billing cycle. If you go from 1 TB to 5 TB on day 15 of a 30-day month, you pay roughly half of (5 TB price - 1 TB price) for the remaining half-cycle.

Downgrades default to "at period end." Going from 5 TB to 1 TB doesn't immediately strip your storage — that would be jarring if you were using more than the new size. Instead, the smaller size takes effect at your next billing cycle, giving you the rest of the current period to free up space first. You're charged the new lower amount starting the next cycle. No prorated refund for the difference (you got the storage you paid for).

If you'd rather take the smaller size immediately and skip the period-end-deferred behaviour, that option is available too on supported tiers, but only when current usage fits in the new size. If you're at 4 TB use and try to immediate-downsize to 1 TB, the system blocks the operation and asks you to either delete files first or pick a larger target.

The full resize flow is covered in Upgrading or Downgrading Storage.

Billing details

A few things worth knowing about the billing experience.

Same payment method as your mail plan. The Add-on is its own subscription line in Stripe, but it bills to whatever default card or payment method is on file for your account. You don't manage two separate cards.

Separate billing date from your mail plan. Add-on subscriptions start the day you purchase them. If your mail plan renews on the 1st and you bought the Add-on on the 15th, the Add-on renews on the 15th of each subsequent month. The two cycles run independently.

Failed payment handling. If a renewal payment fails, Stripe retries automatically over a few days. During that window your storage stays active and you'll see a banner asking you to update your payment method. If retries fail entirely, the Add-on is canceled and the standard cancellation flow runs (covered in Canceling Drive Add-on).

Invoices. You get a PDF invoice for every successful charge, including resizes. Invoices show the prorated breakdown when relevant — useful for accounting if you switched mid-cycle.

What's next

• Subscribing to the Drive Add-on — the actual checkout flow.
• Upgrading or Downgrading Storage — resize once you're subscribed.
• Canceling Drive Add-on — what happens when you cancel.
• Pooled Storage Quotas Explained — how the Add-on capacity gets used.