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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Transcend 32GB JetFlash 790 USB 3.0 Flash Thumb Drive, Black

Product ID: 1611747

Details

Brand
Transcend
Connectivity Technology
USB
Hardware Interface
USB
Special Feature
Lightweight
Write Speed
25

⚡USB 3.1 Gen 1 blazing speed

🔑Keyring loop for on-the-go

🖱️Capless retractable design

€ 26.32

Duties & taxes included

In stock

Sold byAmazon IrelandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🚀 Slide, Store, and Share in Style!

SECURE ORGANIZED - Includes Transcend Elite software for effortless data management and backup.
SLEEK CAPLESS DESIGN - Retractable USB connector means no lost caps and instant plug-and-play convenience.
BLAZING FAST TRANSFERS - Experience lightning-quick USB 3.1 Gen 1 speeds up to 25MB/s for seamless file sharing.
READY FOR EVERY DEVICE - Universal USB Type-A compatibility ensures smooth connection with all your gadgets.
ULTRA PORTABLE LIGHTWEIGHT - Weighing just 9g, it fits effortlessly in your pocket or on your keychain.

The Transcend 32GB JetFlash 790 is a sleek, capless USB 3.1 Gen 1 flash drive featuring a retractable connector and lightweight design. With fast transfer speeds, a handy keyring loop, and bundled data management software, it’s engineered for professionals who demand speed, security, and portability in one compact device.

Specifications

ASIN	B00JKATVUQ
Additional Features	Lightweight, Retractable Connector
Best Sellers Rank	#363 in USB Flash Drives
Brand	Transcend
Color	Black
Compatible Devices	Computers, Laptops, Other USB-enabled devices
Connectivity Technology	USB
Customer Reviews	4.6 4.6 out of 5 stars (6,160)
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 Highlight	USB 3.2 Gen 1 Memory Stick, Capless Retractable Design with Keychain, Data Storage and Backup
Item Part Number	TS32GJF790K
Item Weight	9.07 g
Manufacturer	Transcend
Mfr Part Number	TS32GJF790K
Model Name	JF790
Model Number	TS32GJF790K
Number of Items	1
Number of Packs	1
UPC	760557828006 803983119772 696719128281 885782160247
Warranty Description	limited lifetime warranty
Write Speed	25

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