1 SU = 1 GiB of storage for 1 month. No mystery math. No egress fees. Stack SU packs when you need more.
Storage Units belong to your Vampelium account, not to one product: buy them once and every Vampelium service — VampDrive included — draws from the same allowance.
Preview build: subscribing is being tested and no real money moves. Choosing a plan hands you to Vampelium, which shows exactly what will happen before anything is charged, takes the payment in test credits, and sends you back subscribed. VampDrive never sees a card. Your Storage Unit allowance is granted by your Vampelium account, and checkout is limited to developer accounts while it is in testing.
Stackable: each pack adds its Storage Units on top of your plan's.
Plan + packs → total SU and what it would cost per month. Nothing here is charged; see the note at the top of the page.