Mac mini M4 SSD upgrade modules compared
Apple sells more storage only when you order the Mac, so a handful of small companies sell replacement modules for the Mac mini M4. The modules do the same job; the sellers differ in where they ship from and in what happens if you want to send one back. This page puts them side by side, including us. We checked every competitor's terms on the seller's own store on 25 September 2026. Terms change, so confirm on the seller's page before you order.
Shipping, returns and warranty
| Seller | Ships from | Returns without a reason | Return postage | Warranty |
|---|---|---|---|---|
| PCB Innovations (this site) | Netherlands | 14 days after delivery, under EU law | You pay, to the Netherlands. Faulty modules: at our cost | 2-year EU legal guarantee |
| Expand Mac mini | Shenzhen, China | 30 days from purchase, unused and resellable; the payment fee (about 3%) and the built-in shipping cost (about US$20) are deducted | You pay, to Shenzhen | 1 year, limited |
| iBoff RCC | Malaysia | 7 days after delivery, unused and unopened; payment platform fees are deducted and shipping is not refunded | You pay | 1 year or 600TBW (1TB) / 1200TBW (2TB), whichever comes first |
| SlimQ | Not stated; 2TB from its US warehouse only | 30 days from purchase, unused, in the original packaging | You pay | 1 year, limited |
| M4-SSD | Hong Kong | 14 days after delivery, unused, once the seller authorises the return | You pay, unless the item is defective | 1 year |
| M4BoostHub | Not stated; orders are processed in Hong Kong time | 14 days after delivery; no restocking fee | You pay; defective items get a prepaid label | 1 year |
Terms are summarised from each seller's refund policy and product page on 25 September 2026. Read the full policy before you order: a summary leaves out conditions.
Import charges for EU buyers
Every module on this page costs more than €150, so a parcel from outside the EU pays import VAT at your country's rate, plus any customs duty and the carrier's handling fee, usually collected before delivery.
Our prices include VAT and we ship from the Netherlands within the EU, so nothing is added at the door. See the shipping page for rates.
How to choose
- Buying in the EU and want your EU consumer rights without an import step: a seller inside the EU. Of the sellers here, that is us.
- Need an M4 Pro module: Expand Mac mini, M4-SSD and M4BoostHub list one; we do not sell one yet.
- Want to compare speeds: sellers publish their own benchmark figures, measured on different machines. We have not tested the other modules, so this page does not rank them on speed.
Related questions
Is this comparison neutral?
Which module is the fastest?
Ready to upgrade?
More guides
- Is the Mac mini M4 SSD upgradeable?Yes, and this is the first Mac mini in years where that is true. What the swap involves before you order.
- M4 vs M4 Pro: why the storage module is differentTwo Mac minis from the same year, two different modules. Check which one you have before you order.
- Mac mini M4 SSD DFU restore: step by stepThe part of the upgrade that happens on a second Mac. Exact steps, the black-screen moment, and the fixes when nothing appears.