There seemed some misconceptions in the comments on the download page, so I thought it might be helpful to some if I re-posted my comment & expanded on it a bit.
I'll start by saying that while there are some incredibly cheap tablets & such, there are Android devices that hardly play 2nd fiddle to today's average PC.
http://www.engadget.com/2015/07/10/samsung-11k-display/
The reason I'm leading off with that is because looking at or for PC-centric solutions to working with your Android gear isn't always the best way to go -- in fact to many Android users it's actually a bit oddball. That said, things are quite a bit different in the US than elsewhere, because here most cell phones [& LTE tablets] are both sold & tied to a cellular service or carrier.
One big difference between working with Android devices vs. PCs/laptops is that you don't install an OS [e.g. Windows or *nix], & in fact there isn't a universal, one-fits-all Android OS comparable to say, Windows 8.1 or even Ubuntu Linux. Think of Android as more a framework that can be tailored into a specific OS for each & every device. To replace the version of Android you replace the image, much like you'd update firmware. And the basic, out-of-box image usually stays put, so you can reset your Android cell or tablet to the way it was when you 1st unpacked it.
While you can back up that image, software to do so is usually related to projects where you can replace the ROM, say with a newer version of Android -- because the OS is so tailored to the device, you're very often stuck with what came with it [forever] otherwise. What you do normally backup is everything you've added since you unpacked your tablet or cell. You may back it up to Google, the device manufacturer, your cellular carrier etc., & that's usually the simplest, easiest, don't worry about it method.
Moving files back & forth, between your cell/tablet & whatever else, be it a PC or cloud storage, is usually easiest using something like Dropbox, unless the file(s) is huge. The fastest way is if your device lets you use a microSD card, use a USB 3.0 card reader. USB 2.0 direct connections usually work, normally with no drivers or software needed when you connect your cell/tablet with your PC/laptop. Depending on your device, if your PC/laptop has a wireless networking adapter, you might be able to share files directly that way too, without going through your network. There are also apps that basically set up a server on your PC/laptop or Android device, so you use your network basically the same way you use the Internet, transferring files etc.
Now, on to Apowersoft Phone Manager... It's a semi-complicated app that added 473 files & 609 new registry entries when monitored in my XP Mode VM -- newer versions of Windows will likely have more registry entries. It does add drivers.
When you connect your cell or tablet to your PC/laptop via USB, you will not see every file/folder on the Android device, because 1st off Android is derived from *nix, which uses a different file system. This sort of software helps bridge that gap, though you'll still not see everything, even using the device itself unless it's rooted. OTOH you can use your device to put stuff you want to share in the storage that's accessible to your PC via plain USB.
Apowersoft Phone Manager bundles several functions together in a Windows/Android pair of apps. This is a case where I think it's helpful to spend some time on the software's web site. There are several ways to get the software installed on your Android device -- using their web site, scanning the code, the Google Play store, transferred via USB cable, transferring the apk via Dropbox or Onedrive, if your device supports it via WiFi, copying it to a microSD card if your device can use one etc. The Android app does require USB Debugging turned on -- see your device manufacturer's directions. Installing the Windows software is of course pretty straightforward.
Apowersoft Phone Manager brings several functions together in one piece of software that works with Android & iOS devices. In a way it's like the power tools or yard tools or small kitchen appliances &/or tools/gadgets that can perform several [often very] different functions -- the idea is you buy one thing instead of several, & always the downside is that they never perform as well as the separate tools. Still, many people would rather go that route, only having to deal with one thing instead of several. Just remember that with Android there is some truth to the saying: "There's an app for that."
Windows mobile devices are a bit of a gray area, because Windows 10 Mobile is not near finished yet, & my understanding is that most all current phones will be upgraded to 10. It's estimated to be a year before we see small Windows tablets running win10 Mobile -- until then & with larger Windows tablets [e.g. Surface] they run the same Windows you do on your PC/laptop. Backing them up &/or connecting them to your PC/laptop works the same as with PCs/laptops.