Storage · Comparison

WD_BLACK C50 vs Seagate Storage Expansion Card

Unlike the PS5 side of this ranking, there is no DIY option for Xbox Series X|S — a generic external SSD can store games but cannot run them at full performance. These are the only two officially licensed expansion cards, and per our sources they are functionally identical: both match the console's internal drive speed and support Quick Resume. The decision comes down almost entirely to price.

Last updated 2026-07-29.

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Quick comparison

Ranked by Picksights Score. Prices are approximate and change frequently.
Product	Picksights Score	From	Best for
#1 · WD_BLACK WD_BLACK C50 Expansion Card for Xbox Series X\|S (1TB)	7.8/10	$149.99	Best value
#2 · Seagate Seagate Storage Expansion Card for Xbox Series X\|S (1TB)	7.6/10	$155	Best for most players

Swipe the table sideways to see every column.

Top pick

WD_BLACK

Number 1: WD_BLACK C50 Expansion Card for Xbox Series X|S (1TB)

PS7.8/10

Best value

The arrival of this card is the reason Xbox storage stopped being a one-brand market. Performance is indistinguishable from Seagate's — both match the internal drive — so the decision comes down to price, and this one usually undercuts it. Buy whichever is cheaper on the day.

Pros

Functionally identical performance to the Seagate card, including Quick Resume support
Consistently cheaper than Seagate at the same capacity
Available in 512GB, 1TB and 2TB, so there is a genuine entry point

Cons

Still far more expensive per gigabyte than a standard NVMe drive
Proprietary format — it works only in an Xbox Series X|S expansion port

From $149.99Approximate — prices change

See current price

Sources: GamesRadar+ review (2025-04-01) · Windows Central review (2023-11-15)Last checked by Picksights 2026-07-29

Seagate

Number 2: Seagate Storage Expansion Card for Xbox Series X|S (1TB)

PS7.6/10

Best for most players

Unlike the PS5 side of this guide, there's no DIY option here — a generic external SSD can store Xbox Series X|S games but can't run them at full performance. This is the only real choice for expanding playable storage; the question is just which capacity.

Pros

Plug-and-play — no tools or disassembly, unlike PS5's internal M.2 install
Matches the Xbox Series X/S internal SSD's speed and Velocity Architecture support exactly
Officially licensed — the only certified way to play Xbox Series X|S-optimized games from expanded storage

Cons

Proprietary — this card only works in an Xbox Series X/S, unlike a generic external drive
1TB may not be enough alongside GTA VI and an existing library

From $155Approximate — prices change

See current price

Sources: Windows Central (2024-11-06)Last checked by Picksights 2026-07-29

How we rank

Same formula as the full SSD ranking these two come from: speed, ease of setup, price-to-value and capacity-to-value, weighted identically for every drive in that category.

Speed and ease of setup score near-identically for both, per our sources — this comparison is effectively decided by price-to-value alone. Whichever is cheaper on the day you buy is the better pick; there is no meaningful performance reason to prefer one over the other.

Full ranking: Best SSD for PS5 and Xbox Series X →

WD_BLACK C50 in depth: Full WD_BLACK C50 review →

The PS5-side equivalent: WD_BLACK SN850P vs Samsung 990 PRO →