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Windows Readyboost: What is it?

  • Oct 28, 2025
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If you have a USB Stick, plug it in, shows you the Windows that you can use the drive for Windows Readyboost. What is the actual light is, we will explain in this practical tip.

Faster with Cache: Windows Readyboost

Normal hard drives compared to Flash memory, a high access time. Readyboost expanded the Cache of the hard disk to the memory space, e.g., through a USB-Stick. So it is at least theoretically possible that your System will run faster. Especially for systems with little RAM, the technology makes itself quite noticeable. Things you should know about:
  • Thus, your System is not slowed down by Windows first of all a speed test. Only then can you decide how much storage you want to place the Sticks/ to the SD card as an additional Cache.
  • Readyboost is supported since Windows Vista. However, you can use in Vista to a maximum of four GB as an external Cache. Starting from Windows 7, up to 32 GB per storage medium are possible, of which up to eight PCs can use.
  • In order to be able to use Windows 7 more than four Gbytes, must be formatted the disk NTFS or exFAT. Other supported file systems are FAT and FAT32. Windows Vista requires at least Service Pack 1, so you can use exFAT formatted Sticks for Readyboost.
Windows: Readyboost Icon
How Readyboost to use correctly, we will show you in a further practical tip.

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