SSK
SSK 256GB USB C Flash Thumb Drive up to 550MB/s Dual USB C+A Memory Stick
Bottom line: The SSK 256GB USB C Flash Thumb Drive up to 550MB/s Dual USB C+A Memory ($59.99 on Amazon as of 2026-10-20 20:16 UTC): Dual USB-C and USB-A 3.2 Gen 2 ends, no dongle needed; main trade-off: not compatible with Lightning ports, so older iPhones are out.
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*Price sourced from Amazon.com. Last updated 2026-10-20. Price and availability subject to change.
Pros & Cons
Pros
- ✓ Dual USB-C and USB-A 3.2 Gen 2 ends, no dongle needed
- ✓ Rated up to 550MB/s read, 500MB/s write
- ✓ Zinc alloy shell resists drops and abrasion
- ✓ Ships exFAT-formatted, plug-and-play on Windows, Mac, Linux, Android
Cons
- ✗ Not compatible with Lightning ports, so older iPhones are out
- ✗ exFAT default may need reformatting for Time Machine backups
- ✗ Dual-cap design means two small covers to keep track of
- ✗ SSK cites internal testing for the 550MB/s figure, not third-party
Manufacturer description
The SSK 256GB USB-C flash drive solves the problem most thumb drives create: needing an adapter. It carries a USB-C port on one end and a USB-A 3.2 Gen 2 port on the other, so the same stick moves files between an OTG-enabled Android phone, a MacBook, a Windows laptop, a car audio head unit, or a smart TV without a dongle in between. SSK rates it at up to 550MB/s read and 500MB/s write, which the brand describes as roughly ten times the throughput of a traditional USB 3.0 memory stick, so 4K clips and multi-gigabyte project folders clear in a fraction of the time a standard flash drive would…
SpecPicks Verdict
SpecPicks scored SSK 256GB USB C Flash Thumb Drive up to 550MB/s Dual USB C+A Memory… using a rating × review-volume × price-fit model applied to published specs and reviews across the accessories category. SSK's accessories 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 accessories 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
Will this work with my iPhone?
It works with USB-C iPhones such as the iPhone 15, 16, and 17. SSK states it is incompatible with Lightning ports, so iPhone 14 and earlier will not connect without a separate adapter.
How fast is it really?
SSK rates it at up to 550MB/s read and 500MB/s write over USB 3.2 Gen 2, based on internal testing. Actual speed varies with your host device, port, and file sizes; plugging into a USB 3.0 or 2.0 port will be slower.
Do I need to install any software or drivers?
No. It is plug and play. The drive ships preformatted in exFAT and is recognized by Windows, macOS, Linux, and OTG-enabled Android devices without any installation.
Can I use it with my car stereo or smart TV?
Yes, via the USB-A end. SSK lists car audio systems and smart TVs among supported devices, and the drive is backward compatible with USB 3.0 and USB 2.0 ports.
Is 256GB the only size, and how durable is the drive?
This listing is the 256GB version. The housing is zinc alloy rather than plastic, with a double-head cover protecting both connectors, and SSK cites shock resistance and heat dissipation as design goals for the metal shell.
Key Features
- Dual Drive USB C + USB A: Equipped with an USB-C port and USB-A 3.2 port,the Dual USB SSD flash drive allows you transfer data between smartphone/tablet and computer more conveniently. Instantly release space or quickly move pictures or movies on your OTG enabled Android Type C phone, tablet, MacBook, Windows computer, car audio system, smart TV and more.
- Ultra Fast High Speed: SSK USB 3.2 GEN 2 flash drive up to 550mb/s read speeds and 500mb/s write speed, which is 10 times faster than traditional USB 3.0 memory stick. Let you move high-resolution photos, videos fast and large-capacity files. Based on internal testing, performance may vary slightly due to factors such as host equipment, interfaces, and usage conditions.
- Plug and Play: Ultra dual drive supports plug and play, without any software installation. At the same time, USB stick storage can expand the capacity of phones and computer. It is convenient for everyone to use the mobile phone to directly read the flash drive for file sharing, data transmission, and video playback when working or studying. Work with most systems such as Windows / Android/ Macbook Pro and Mac OS. (incompatible with lightning port)
- Safe & Reliable: USB SSD drive is made of high-grade zinc alloy shell, which is resistant to falling and abrasion. The design of the double-head protective cover better protects the two interfaces. External memory stick have excellent shock resistance and fast heat dissipation performance to better protect your data.
- Universal Compatibility: High speed USB stick external storage compatible with computer equipment, smart TV, car audio, smart phones, iPhone 15, iPad, Laptops, Macbook and more. Backward-compatible with USB 3.0 and USB 2.0 ports. Comes with default format EXFAT, it works with most systems such as Windows/Linux/Mac OS./Android(Incompatible with lightning port)
Full Specifications
| Brand | SSK |
|---|---|
| Color | Black |
| Model Name | SD301/256GB |
| Read Speed | 550 megabytes_per_second |
| Unit Count | 1 Count |
| Form Factor | Portable |
| Media Speed | 500 megabytes_per_second |
| Connectivity | USB-C |
| Model Number | SD301 |
| Compatibility | Android, iOS, Mac, Linux |
| Built-In Media | USB Cable |
| Hard-Drive Size | 256 GB |
| Mfr Part Number | SD301 256GB |
| Number of Items | 1 |
| Special Feature | Portable |
| Installation Type | External Hard Drive |
| Compatible Devices | Android Phone, Laptop, PS4, PS5, Tablet |
| Data Transfer Rate | 550 megabits_per_second |
| Enclosure Material | Nand Flash |
| Additional Features | Portable |
| Full listing title | SSK 256GB USB C Flash Thumb Drive up to 550MB/s Dual USB C+A Memory Stick | 2 in 1,OTG,USB A+C 3.2 Gen2,High Speed,Zinc Alloy,External Solid State Drive for iPhone 15/16/17/Android Phone/MAC |
Ready to buy?
SSK 256GB USB C Flash Thumb Drive up to 550MB/s Dual USB C+A Memory Stick | 2 in 1,OTG,USB A+C 3.2 Gen2,High Speed,Zinc Alloy,External Solid State Drive for iPhone 15/16/17/Android Phone/MAC 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.
*Price sourced from Amazon.com. Last updated 2026-10-20. Price and availability subject to change.
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