This article covers IODATA USBメモリー 64GB Type-A＆Type-C搭載 USB 3.2 Gen 1対応 スマホ 容量不足 PC データ共有 バックアップ 日本メーカー ブラック U3C-STD64G.
Overview
I-O DATA Device (IODATA) brings a clever solution to the perennial problem of file transfer between PCs and mobile devices with the U3C-STD64G/KUE, a USB flash drive that packs both USB-A and USB-C connectors on the same body. This particular variant is a 3-pack, giving you three 64GB drives. Each unit weighs almost nothing and fits easily into a pocket or bag, making it an ideal travel companion. The U3C-STD64G/KUE uses the USB 3.2 Gen 1 interface, which deliverstheoretical burst speeds up to 5Gbps — enough for quick office document transfers, photo backups, and light media swapping. The dual-connector design eliminates the need for dongles: plug the USB-C end directly into an Android phone, iPhone 15 series, iPad, or MacBook, and use the USB-A end with traditional desktop PCs and laptops.
Connectivity & Compatibility
This drive acts as a bridge between the USB-A world and the USB-C ecosystem. It supports the following devices out of the box: Windows PCs (desktops and laptops with USB-A or USB-C) MacBooks with USB-C (MacBook Air/Pro, 2016 and later) iPad Pro / iPad Air (USB-C models) Android smartphones and tablets with USB-C (OTG support required) * iPhone 15, 15 Plus, 15 Pro, 15 Pro Max The interface speed is USB 3.2 Gen 1 (5Gbps), backward compatible with USB 2.0 and USB 3.0 ports. The 64GB capacity per drive is fine for document libraries, several thousand photos, or a handful of movies. For heavy 4K video work on the go, though, you’ll want to consider larger-capacity drives.
Product Info
The U3C-STD64G/KUE is a mid-entry-level flash drive from IODATA. It was introduced in the 2020s as a practical, dual-purpose storage accessory. The 3-pack configuration is sold through various online retailers including . Street price for the bundle is around ¥13,461 (as of mid-2026), making each drive roughly ¥4,487 — a fair deal given the dual-connector convenience. The warranty is one year from the manufacturer. Included in the box are the three drives and protective caps for both USB-A and USB-C connectors on each unit. No additional software or drivers are needed; the drive is recognized by all modern operating systems as a standard mass-storage device.
Best Use Cases
① Mobile professionals shifting data between phone and PC If you often shoot photos or videos on your smartphone and need to transfer them to a laptop for editing, this drive is a huge time-saver. Plug the USB-C side into your phone, copy the files, then plug the USB-A side into your desktop — no cloud uploads or cable swapping required. ② Multi-device households or small teams The 3-pack makes it easy to dedicate one drive to each family member or work colleague. Everyone can have their own portable storage without fighting over a single drive. ③ iPhone 15 users upgrading from Lightning With the iPhone 15’s switch to USB-C, you can now directly attach this drive and offload videos and photos. It’s a simple, cheap way to expand storage without subscribing to iCloud. If you’re a video editor moving terabytes of footage daily, 64GB per drive will feel constraining. Look at 256GB or 512GB alternatives for that workflow. ## Alternatives
Direct competitors include the SanDisk Ultra Dual Drive Go and the Buffalo RUF3-PUAC series. SanDisk offers slightly faster read speeds (up to 150MB/s) and a more compact form factor, but single-drive pricing is higher per gigabyte. IODATA’s advantage here is the 3-pack bundle and the trusted Japanese brand warranty. Buffalo’s solution uses a slide-out mechanism instead of caps, eliminating the risk of losing the cover. IODATA sticks with traditional caps, which offer better physical protection for the connectors when not in use. Both are fine choices; the decision comes down to whether you prefer cap-free convenience or cap-based durability.
Things to Consider
First, don’t expect blazing speeds. Despite USB 3.2 Gen 1 support, the NAND flash inside is entry-level, so real-world sequential reads hover around 100–150MB/s and writes are slower. Large file transfers will take noticeable time. Second, this is a 3-pack. If you only need one drive, the single-pack version (U3C-STD64G/K) is a better buy. The bundle makes sense only if you genuinely need multiple drives. Third, verify that your smartphone supports USB OTG (On-The-Go). Most modern Android phones and all iPhone 15 models do, but older devices may not. Check your phone’s specs before relying on direct connection.
Product Disclosure (Amazon)
- Manufacturer: アイ・オー・データ
- Seller: Amazon.co.jp
- Fulfilled by: Amazon.co.jp
- ASIN: B0H8SGTSMK
- Note: This article covers a manufacturer-made product based on Amazon listing details.
