Taken from the WoT RU portal
Continuing the practice of pre-downloading the update, we suggest that you download the version 9.22 in advance from January 31, 12:00 (MSK). The update itself will be released soon after the preload version.
Pre-distribution of the update will reduce the load on gaming services on the day of its official release. And you, after downloading the new version in advance, will be able to try out its innovations as soon as the update is released – without delays and tedious waiting.
We remind you that this is still nothing more than a test of a new process, and there is no talk of introducing such a distribution of updates on an ongoing basis.
What is preload?:
This is the download of the future update files (approximate sizes are 400 MB for the SD client and an additional 600 MB for the HD version), but with installation only on the day of its official release. Installation will take place after the launch of the launcher after the completion of work on the game servers.
To start automatic downloading in the settings of the launcher, a checkmark in the item “Allow pre-download updates” (by default it is activated) should be checked.
Will preloading 9.22 somehow affect the ability to play in tanks?:
In no way – you can at any time start playing in tanks. But in this case, the download will automatically pause, and will resume immediately after you exit the game. You can also put the download on pause at any time.
Where will the update be stored? Can I drop it on a USB flash drive and take it to a friend?:
Yes, you can carry it to a friend, because the update will be based on the standard address on your computer C:\Games\World_of_Tanks\Updates (or, if the game is installed elsewhere – your drive:\Games\World_of_Tanks\ Updates)
If I click on a pause in the launcher, will the download resume the next time it is turned on, or should I start the download on a new one?
It will resume.
Will I be able to choose the pre-boot stage, will the HD or SD client be downloaded?:
No. Download update files for the type of client that you have selected at the moment.
Where can I go if there are technical problems during the preliminary download?:
Discuss this news at the forum, we will answer your any questions on this topic.