How to copy WP Standalone Site into a WP Multisite Network with UpdraftPlus

I am running a WordPress multisite network on the latest version of WP 4.6.1

I need to migrate a standalone s2Member WordPress site running version 4.5.4

The standalone WP site contains:

• 591 Posts
• 9 post Categories
• 526 post Tags
• 327 media library files
• 35 Pages
• 1,067 Comments
• 1 Theme
• 23 Plugins (including s2Member)
• 1,259 Users (128 users are paid-for s2Member subscribers through recurring PayPal subscription renewals)

Does or can your UpdraftPlus plugin handle a migration of this nature (a) keeping all content in tact and (b) all user accounts and subscriptions in tact?

Any advice or suggestions you may have is greatly appreciated. Thank you.