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Silicon Power Mobile C31 SP064GBUC3C31V1K 64GB Dual USB-A USB-C Flash Drive Swivel Metal 3.3 g Black

Brand:
Silicon Power
SILICON POWER Mobile C31 USB flash drive 64 GB SP064GBUC3C31V1K
Silicon Power Mobile C31 SP064GBUC3C31V1K 64GB Dual USB-A USB-C Flash Drive Swivel Metal 3.3 g Black
€25.74 inc. VAT
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SP064GBUC3C31V1K
€21.63
€25.74 inc. VAT
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Product Code
04:239034
EAN Code
4712702655957
Manufacturer
Silicon Power

Quick Specs

Capacity
64 GB
Connectors
USB-A + USB-C
Size and Weight
33.2 x 12.3 x 8.5 mm, 3.3 g
Cap
360-degree swivel, cannot be lost
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Silicon Power Mobile C31 64 GB — 3.3 Grams, USB-A and USB-C

USB-A + USB-C64 GB3.3 g, 33 mm long5-year Silicon Power warranty

The Silicon Power Mobile C31 is a 64 GB USB 3.2 Gen 1 flash drive with both a full-size USB-A plug and a USB-C plug, in a diamond-cut metal body that weighs 3.3 g and is 33.2 mm long. A 360-degree swivel cap covers whichever end is not in use, so nothing detaches. Silicon Power builds it with COB construction and backs it with a five-year warranty.

Compatibility — check before buying:
Our supplier data describes this as a USB-C drive. It is in fact dual-ended — Silicon Power’s own specification lists the interface as USB 3.2 Gen 1 Type-A and Type-C, and the product sits in its Type-A + Type-C category. That is good news: it plugs into an old laptop and a new phone alike, with no adapter. To use the USB-C end on a phone or tablet, the device must support USB On-The-Go — Silicon Power says so explicitly and it covers virtually every recent Android device. Silicon Power lists Android 4.1 and later and does not list iOS, so an iPhone is not a supported device here. One honest gap: Silicon Power publishes no read or write speed for the Mobile C31. Its own specification table shows n/a at 16, 32, 64 and 128 GB alike, so no figure appears on this page and any MB/s number you see quoted elsewhere did not come from the manufacturer. Note also that 128 GB is the largest capacity in this family.

Best For

✓ Moving files between an older USB-A laptop and a USB-C phone or tablet
✓ Anyone who wants the smallest possible dual-connector drive — 3.3 g
✓ Keyring or pocket carry where a full-size stick is too bulky
✓ Freeing space on an Android phone without a cloud account
✓ Buyers who value a five-year manufacturer term
✓ A drive whose cap physically cannot be lost

Key Features

 
Both connectors, 3.3 grams
USB-A and USB-C on one body 33.2 mm long, weighing 3.3 g. It is jewellery-sized rather than stick-sized, and it removes the need to carry an adapter.
 
360-degree swivel cap
The cap rotates around the body and covers whichever connector is not in use. It never detaches, so there is nothing to lose — and Silicon Power finishes it with a diamond-cut pattern.
 
COB construction
Chip-on-Board packaging is what keeps the drive this small, and Silicon Power states it also gives protection against water, vibration and dust. No formal IP rating is published, so treat it as robustness rather than a waterproof claim.
 
Free software, nothing preloaded
SP Widget for the computer, SP File Explorer for Type-C and Android devices with one-touch backup, and Recuva file recovery. All are free downloads; the drive itself needs nothing installed.

Technical Specifications

Identification
Brand Silicon Power
Series Mobile C31 OTG
Part Number SP064GBUC3C31V1K
EAN / GTIN 4712702655957
Drive
Capacity 64 GB — the family runs 16, 32, 64 and 128 GB
Interface USB 3.2 Gen 1 Type-A and Type-C, backwards compatible with USB 3.0 and USB 2.0
Connectors USB Type-A and USB Type-C on one body
Read and Write Speed Not published by Silicon Power at any Mobile C31 capacity
Physical
Dimensions 33.2 x 12.3 x 8.5 mm
Weight 3.3 g
Material Metal and plastic, diamond-cut pattern
Cap 360-degree swivel cap, attached to the body
Colour Black
Construction COB (Chip on Board), stated by Silicon Power to protect against water, vibration and dust. No IP rating is published
Compatibility and Environment
Operating Systems Windows 11, 10, 8.1, 8, 7, Vista and XP; Mac OS 10.3.x and later; Linux 2.6.x and later
Mobile Android 4.1.X and later, and Windows Phone 8 and later. The device must support USB On-The-Go. iOS is not listed
Operating Temperature 0 °C to 70 °C
Certification BSMI, CE, FCC, KC, EAC
Software SP Widget, SP File Explorer and Recuva — all free downloads, none supplied on the drive
In the Box
Contents The flash drive. Silicon Power does not describe a cable, adapter or pouch as part of the pack.
Warranty
Warranty 1-Year Warranty (Singular)
Manufacturer Term Silicon Power publishes a 5-year warranty for this model on its product specification table. Singular’s direct warranty is 1 year; beyond that we assist you with the manufacturer’s warranty process for its full duration.

Frequently Asked Questions

Is this USB-C only, or does it also fit a normal laptop?
Both. Silicon Power lists the interface as USB 3.2 Gen 1 Type-A and Type-C, and sells it in its Type-A + Type-C category. One end is the full-size rectangular plug for a laptop or desktop, the other is USB-C for a phone, tablet or modern notebook. Some listings describe it as USB-C only; that is incomplete.
Why is no transfer speed shown?
Because Silicon Power publishes none. Its own specification table reads n/a for read and write at every Mobile C31 capacity, including this 64 GB. We would rather leave the line honest than borrow a number from a reseller. If a stated speed is important to your decision, ask us and we will point you at a model that publishes one.
Will it work with my phone?
If the phone has a USB-C port and supports USB On-The-Go, yes — Silicon Power lists Android 4.1 and later, and says explicitly to check OTG support before use. It does not list iOS, so an iPhone is not supported. Tell us the model and we will check.
Is it really waterproof?
Silicon Power states that COB construction protects the drive against water, vibration and dust, but it publishes no IP rating. Read that as a robustly built drive rather than one you can deliberately submerge. We would not advise testing it.
Singular Expert Insight
This is the smallest useful dual-connector drive we stock: 3.3 grams and 33 mm, with both plugs and a swivel cap that cannot be lost. If you want one drive that works with a laptop and a phone and you want to stop noticing it in your pocket, this is the shape to buy. Two things to weigh honestly. Silicon Power publishes no speed at all for the C31 — not a slow figure, no figure — so if throughput is how you choose, models such as the Kingston microDuo 3C G3 or the Silicon Power Mobile C51 do state theirs, and you can compare them across our USB flash drives range. And 128 GB is the ceiling for this family, so it is not the drive for a media library. For large working files, an external SSD is the right class of product.

Buyer’s Guide

Buy it if

You want the smallest possible drive that plugs into both a laptop and a USB-C phone, you like a cap that cannot be lost, and a five-year Silicon Power term suits you.

Skip it if

You choose drives on published read and write figures — Silicon Power states none for this model. You need more than 128 GB. Or you need iPhone support.

Also consider

Silicon Power Mobile C51 if you want a dual-ended drive with published per-capacity speeds. Kingston DataTraveler microDuo 3C G3 for a stated 200 MB/s read. An external SSD for large transfers.

Features - Silicon Power - SP064GBUC3C31V1K

Colour
black
Interface
  • USB3.2,
  • USB Type-C
More Details
Product Code
04:239034
EAN Code
4712702655957
Manufacturer
Silicon Power
Technical specifications
Capacity
64GB
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