You can right click or press and hold on a drive in Windows, and click/tap on Properties to see more details about the drive’s properties.
The ReadyBoost tab in the properties page window of drives allow you to manage using the ReadyBoost feature on removable storage media such as a SD card or USB flash drive.
If you have a NetBook or an older PC with relatively low memory or little disk space capacity, you could use the ReadyBoost function to provide this PC with more memory. You can use non-volatile flash memory such as current USB memory stick or SD memory cards to improve the performance of your system. This additional memory is provided as cache memory, to speed up, for example, the loading or editing of large files.
ReadyBoost will not be enabled if the computer is fast enough that ReadyBoost is unlikely to provide additional benefit. In this situation, you may want to remove the ReadyBoost tab on the Properties page of drives since you will not be using it.
This tutorial will show you how to add or remove the ReadyBoost tab on the Properties page of drives for all users in Windows 7, Windows 8, and Windows 10.