SSK
SSK Portable SSD 250GB External Solid State Hard Drive USB C Up to 1050MB/s
Bottom line: The SSK Portable SSD 250GB External Solid State Hard Drive USB C Up to: Up to 1050MB/s read, 1000MB/s write over USB 3.2 Gen2 10Gbps; main trade-off: 250GB fills fast for 4K ProRes work; larger tiers cost more.
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Pros & Cons
Pros
- ✓ Up to 1050MB/s read, 1000MB/s write over USB 3.2 Gen2 10Gbps
- ✓ Ships with both USB-C and USB-A cables, no adapter needed
- ✓ 36.6g and 2.6 x 1.5 x 0.5 in, genuinely pocketable
- ✓ Records 4K60Hz ProRes HDR straight from iPhone
- ✓ Under 2.4W draw runs on phone and tablet power alone
Cons
- ✗ 250GB fills fast for 4K ProRes work; larger tiers cost more
- ✗ Shows as roughly 232GB in Windows due to binary math
- ✗ SLC cache covers only 25% of free space, so long writes can slow
- ✗ Aluminum case peaks at 105.58F and gets warm to the touch
Manufacturer description
The SSK Portable SSD 250GB is a pocket-sized external solid state drive built for people who move large files between phones, tablets, and computers without waiting. Over a USB 3.2 Gen2 10Gbps connection it reads up to 1050MB/s and writes up to 1000MB/s, and SSK includes both a USB-C and a USB-A cable so the drive works across a laptop, a desktop, and a modern iPhone without an adapter hunt. Video shooters get the most obvious payoff: the drive supports 4K60Hz ProRes HDR capture directly from iPhone, and because it draws under 2.4 watts it runs off mobile device power alone. Portability is…
SpecPicks Verdict
SpecPicks scored SSK Portable SSD 250GB External Solid State Hard Drive USB C Up to… using a rating × review-volume × price-fit model applied to published specs and reviews across the external storage category. SSK's external storage lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.
Common buyer scenarios for external storage of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.
Frequently Asked Questions
How fast is the SSK Portable SSD 250GB?
It reads up to 1050MB/s and writes up to 1000MB/s over a 10Gbps USB 3.2 Gen2 connection. An LED on the drive indicates active transfers.
Why does my 250GB drive only show 232GB?
That is the binary versus decimal capacity calculation. Windows reports roughly 232GB while macOS can display the full 250GB. Physical storage on the SSD is unchanged.
Does it work with iPhone for ProRes video?
Yes. The drive supports 4K60Hz ProRes HDR capture from iPhone and draws under 2.4 watts, so it runs on mobile device power without an external supply.
Do I need to buy a separate cable?
No. SSK includes both a USB-C and a USB-A cable, both rated for USB 3.2 Gen2, so it connects to phones, tablets, laptops, and desktops out of the box.
Does it slow down during large file transfers?
SLC caching allocates 25% of currently available capacity as high-speed cache, holding 10Gbps speeds for transfers that fit within that cache. Transfers larger than the cache may drop below peak speed.
Key Features
- Capacity Display Variance: 250GB external ssd often appears as around 232GB on Windows. MacOS can show full 250 GB capacity. This is binary calculation difference and doesn’t affect SSD hard drive actual physical storage
- 1050 MB/s Speed: Instantly access to your files with blazing-fast 10Gbps external SSD read up to 1050MB/s and write up to 1000MB/s. LED Light indicates USB SSD instant activity
- Data Security: Solid state drives S.M.A.R.T. health diagnostics and adaptive TRIM optimizing data block management ensures consistent write speeds and extends the longevity of the portable SSD
- USB-C & USB-A Cable: Both cables featuring rapid USB 3.2 Gen2, this USB SSD effortlessly bridges devices, enabling seamless cross-platform file transfers and backup between computers, smartphones, tablets and iPhone
- Always Fast: No slowdowns for large file transfers. With SLC caching (25% of current available capacity allocated as high-speed cache), this external SSD delivers steady 10Gbps for transfers within the cache capacity
- For iPhone 4K ProRes: Our portable SSD empowers 4K60Hz ProRes HDR video capture for iPhone. Power consumption less than 2.4 Watts, this external SSD effortlessly operates on various mobile devices, ensuring seamless usability on the go
Full Specifications
| Brand | SSK |
|---|---|
| Color | Grey |
| Weight | 36.6g |
| Model Name | SD500/250GB |
| Read Speed | 1050 megabytes_per_second |
| Unit Count | 1 Count |
| Form Factor | portable |
| Media Speed | 1000 megabytes_per_second |
| Connectivity | USB-C |
| Model Number | SD500 |
| Compatibility | iOS, Mac |
| Built-In Media | Installation Guide, USB Cable |
| Item Type Name | External SSD |
| Hard-Drive Size | 250 GB |
| Mfr Part Number | SD500 250GB |
| Number of Items | 1 |
| Special Feature | LED Light, Portable, SMR Technology, TRIM Support |
| Hardware Platform | Linux, Mac, PC |
| Installation Type | External Hard Drive |
| Compatible Devices | Desktop, Laptop, Smartphone, Tablet, iPhone |
Ready to buy?
SSK Portable SSD 250GB External Solid State Hard Drive USB C Up to 1050MB/s is listed on Amazon. Price, availability, shipping and returns are set by Amazon and its sellers — check the listing for current terms. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.
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