Does this still suffer from high temperatures like the previous generation Ultra Fit?

As it is all plastic it does not transfer the heat away quickly and with its small physical size it can't get the heat away fast enough. But it keeps working when it is hot. I ended up using a metal cased Flash Drive (yes it still gets hot) but it cools faster and the socket in my laptop is also metal so heat transfer is better.

What it the write speed???? can't believe the most important information is missing.

I've just bought the 128GB version, and am getting around 22MB/s sustsined write speed. Context is everything: I'm using a very fast laptop with SSD, copying through a USB 3.0 port, and the files are large enough not to skew the results at circa 1GB each. Peak transfer rates are around twice that, but I tend to ignore those as misleading, and focus on the sustained trnasfer rates which tend to give a truer measure.

My car can only accept fat32 format. can i plug and play with this usb or do i need to format the whole 256gb before i transfer my music?

Madam, Sir, I am Eleni from SanDisk® Customer Care and I would like to thank you for your question. Please bear in mind that this USB drive may come preformatted to FAT32 or exFAT based on its production. If your card stereo only support FAT32, you’ll need to make sure the USB drive is formatted to FAT32 on Windows or MS-DOS (FAT) on Mac. If the drive is preformatted to exFAT and you are using a Windows computer, you’ll need a third party app to format it to FAT32. We do recommend using the one below. As format will erase all data from your product, please make sure that you have everything backed up prior to proceeding. 1. Please open your Internet browser and go to http://download.cnet.com/HP-USB-Disk-Storage-Format-Tool/3000-2094_4-10974082.html 2. Click the "Download Now" Link 3. Please select the save option and then select the desktop as the destination folder 4. Please save that utility on your computer's desktop screen. 5. Please run once it is saved on your desktop. 6. Right click on the app to execute it as an administrator and then format your drive to FAT32. Disclaimer Notice: Use of Third-Party Software or Websites: https://kb.sandisk.com/app/answers/detail/a_id/20219 If you would like to get more detailed information on this product, please do not hesitate to contact us at english_support@sandisk.com mentioning the date of my reply or providing the link of this comment. Best regards, Eleni SanDisk Customer Care

Is this flash drive compatible for ReadyBoost on Windows 7?

Yes, I have Windows 7 and I put the drive in the PC and right-clicked to go to Properties. The ReadyBoost tab shows up straight away, with a slider to set the amount of memory on the flash drive to allocate to ReadyBoost, up to about 4G.

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🚀 Ultra-fast, ultra-compact — storage that works as hard as you do!

RESCUE YOUR MEMORIES - Accidentally deleted files? Recover them easily with included RescuePRO Deluxe software.
SECURE YOUR DIGITAL LIFE - Protect sensitive files effortlessly with downloadable password protection software.
PLUG AND STAY CONVENIENCE - Ultra-compact design fits discreetly in your laptop or gaming console for seamless storage expansion.
SPEED THAT KEEPS UP WITH YOU - Transfer a full-length movie in under 30 seconds with blazing 400 MB/s USB 3.2 speeds.
MASSIVE STORAGE MINIMAL FOOTPRINT - 128GB capacity stores your high-res photos, videos, music, and documents without slowing you down.

The SanDisk Ultra Fit 128GB USB 3.2 flash drive delivers ultra-fast 400 MB/s read speeds in a sleek, plug-and-stay design. Perfect for laptops and gaming consoles, it offers secure password protection and data recovery software, making it an essential upgrade for professionals and gamers needing reliable, high-capacity storage on the go.

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Read Speed	4E+2 Megabytes Per Second
Connectivity Technology	USB
Color	Black
Model Name	ULTRA FIT USB 3.1
Flash Memory Type	USB
Manufacturer	Western Digital Technologies Inc.
Hardware Connectivity Technology	USB Type A
UPC	619659163761
Global Trade Identification Number	00619659163761
Item model number	SDCZ430-128G-G46
Hardware Platform	PC, Mac
Item Weight	0.048 ounces
Product Dimensions	1.17 x 0.56 x 0.2 inches
Item Dimensions LxWxH	1.17 x 0.56 x 0.2 inches
ASIN	B07855LJ99
Is Discontinued By Manufacturer	No
Date First Available	December 2, 2017

SanDisk Ultra Fit Flash Drive 128GB (USB 3.2 Memory Stick for Laptops and Gaming Consoles, Plug-and-Stay, Speeds Up to 400 MB/s Read, RescuePRO Data Recovery Software) Black

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