I have found that the build up of Generic volume shadow copies does appear to have at least one undesired effect, i.e. Devices and Printers takes for ever to load up.
The build up on my computer had reached several thousand Genetic volume shadow copies. Trawling the forums often brings up the advice to delete them. However, to delete them one by one is not a practical option. Here is another very quick way of deleting them.
Control panel - Device Manager - View - Show hidden devices.
Click on Devices by connection.
Expand Volume Manager. This will display a list of Generic volumes.
Some of the Generic volumes can be expanded.
Examine these Generic volumes, and if there are any greyed out Generic volume shadow copies (there could be thousands of them), uninstall the parent Genetic volume. All the child Generic volume shadow copies will disappear with the parent.
It may be good idea to restart the computer on completion.
I've used the above method on my computer and so far it does not appear to have caused any problems. Devices and Printers now loads instantaneously anyway.
The Generic volume shadow copies will build up again over time. So I have added this to my regular backup routine to check on the build up. It only takes a couple of minutes.
This may not work for everyone and I hasten to add that I am not a professional!
As always, don't forget to do a backup first (don't bother with Microsoft's backup methods. They don't always work - many posts on this too! I use Macrium Reflect - works well).