It goes from 20-21 mb/s and sometimes drops to 10-11 mb/s on the same file. It even dropped into the kbs at one point. Is that normal?

That will depend on what usb port you are in, and if another device is on the same hub pulling the speed down. Also check what anti-virus program you are using. Finally there is a Microsoft utility to check your usb ports look it up on Microsoft web site and it will answer some of those questions.

The title and description say usb 3.0; however, the drive pictured says usb 3.1. Is this really 3.1 compliant?

I didn't see usb 3.1 mentioned on the page. There would be no point in being a 3.1 drive as 3.1 is mostly for power delivery. There is also a speed increase involved, but I doubt any thumb drive is fast enough to make use of it.

Has anyone used it for readyboost?

Readyboost is not anything that is useful so I doubt anyone has

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JF790 32GB USB 3.2 Gen1 Flash Drive | Retractable Connector, PC/Mac/Laptop/Windows/Computer/Desktop/TV/Car Audio Compatible, USB 2.0/3.0/3.1 Compatible

Product ID: 1611747

Details

Brand
Transcend
Connectivity Technology
USB
Hardware Interface
USB
Special Feature
Lightweight
Write Speed
25.0

⚡USB 3.1 Gen 1 blazing speed

👜Lightweight & ultra-portable

🔄Retractable capless connector

HK$216

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Description

🚀 Slide, Store, and Share in Style — The Ultimate Flash Drive for the Modern Pro

COMPACT LIGHTWEIGHT - Weighing just 0.02 lbs, it fits perfectly in your pocket or on your keyring for ultimate portability.
BLAZING FAST TRANSFERS - Experience lightning-quick USB 3.1 Gen 1 speeds up to 25MB/s for seamless file sharing.
SECURE DATA MANAGEMENT - Includes Transcend Elite software for easy backup, encryption, and file organization—stay in control.
UNIVERSAL COMPATIBILITY - Works flawlessly across PC, Mac, laptops, TVs, and car audio systems—your all-in-one digital companion.
SLEEK RETRACTABLE DESIGN - Capless, slide-out USB connector protects your data and eliminates lost caps—effortless on-the-go use.

The Transcend JF790 32GB USB 3.1 Gen 1 flash drive combines rapid data transfer speeds with a smart retractable connector design, ensuring your files stay protected without the hassle of caps. Ultra-lightweight and compatible with a wide range of devices, it’s engineered for professionals who demand speed, convenience, and reliability on the move.

Specifications

ASIN	B00JKATVUQ
Additional Features	Lightweight, Retractable Connector
Best Sellers Rank	#520 in USB Flash Drives
Brand	Transcend
Color	Black
Compatible Devices	Computers, Laptops, Other USB-enabled devices
Connectivity Technology	USB
Customer Reviews	4.5 4.5 out of 5 stars (8,656)
EU Spare Part Availability Duration	1 Years
Flash Memory Type	CompactFlash
Global Trade Identification Number	00760557828006
Hardware Connectivity Technology	USB Type A
Hardware Interface	USB
Item Part Number	TS32GJF790K
Item Weight	0.02 Pounds
Manufacturer	Transcend
Mfr Part Number	TS32GJF790K
Model Name	JF790
Model Number	TS32GJF790K
UPC	760557828006 803983119772 696719128281 885782160247
Warranty Description	limited lifetime warranty
Write Speed	25.0

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HK$216

Duties & taxes included

In stock

Sold byAmazon Hong KongDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Hong Kong.

Secure transaction

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