Hi,
Don't worry about the "Virtually" comment... that was just my way of saying that Acronis Images everything on the disk... even the blank space...
The image is an exact copy of the entire HDD, or individual partitions...
When you choose to Image only files, that would be something like you Pictures folder or something...
Don't worry about imaging blank space... because it is blank space it compresses to almost nothing... 20GB of blank space might take up 20MB of the Image...
The actual Image will be slightly smaller than the USED space on the drive...
When I mentioned a FULL backup, that was in comparison to a Incremental backup, which only images what has changed since that last FULL backup... It takes up less space, but requires multiple steps to Recover the drive...
I don't have a problem with Storage space, so I always use the Full...
If I need more storage space, I look for a new HDD on sale...
I always do a Complete\Full backup... That way everything on your HDD is there if you need it... Like I mentioned before, sometimes I Image the entire drive, and sometimes just the OS partition..
As a general rule, the EFI and other partitions very rarely get changed...
As far as booting from a Flash Drive... that depends on the circumstances...
The feature you mentioned that suggests a Flash Drive may work when other methods don't, or Vice Versa...
My point was that there are now two, actually three, types of flash drives that are sometimes not interchangeable... The only way to know for sure if what you want to do will work would be to try it...
The Windows feature that you mentioned suggests a flash drive may actually require a very specific type of flash drive... the NEW type I mentioned.. I'm not 100% sure which feature you were talking about...
There is a process for a Recovery Image that would be just Windows, or possibly a bootable repair media, then there is File History that backs up all of your stuff like photos, documents, and etc, and finally there is "System Image" which creates a backup
image of the entire HDD as it currently is...
Part of the problems you are having are due to the actual computer... not Windows...
It doesn't matter much what Windows says if the machine will not support it...
The UEFI BIOS is a function of the actual computer, not Windows...
If the UEFI is available, Windows will then take advantage of it if the installation is configured properly, but the actual UEFI BIOS is contained on a small memory chip inside your computer...
A flash drive that is to be used for booting into a UEFI machine... at least as far as installing Windows goes, needs to be created in a specific way, or it will not be recognized... Something they messed up with UEFI standards... or lack of..
Acronis running in legacy mode won't b a issue... it is simply making a copy of your HDD.. It will restore the image to a HDD\SSD regardless of the UEFI\Legacy setting...
Acronis doesn't care about windows type requirements to function... It has it's own operating system and runs out of memory once the CD boots...
You will just need to reset your BIOS to UEFI after using Acronis in order for it to boot into Windows..
Acronis is about the quickest, most versatile, and probably reliable method that exists.
After trying multiple other methods, I feel quite safe in saying that...
I have used several other programs that get the job done, but in every case, Acronis either has more available options, or is faster...
An example... I have a Video Editing program, that with some of the other methods, requires reinstallation after reloading a backup image... It somehow detects a change, and for licensing purposes requires a reinstallation for it to activate...
There is no such problem when using Acronis...
In comparing to Macrium, Acronis is 2-3 times faster on my machine...
In comparing to the Windows Imaging function, Acronis is faster, and will allow to select which partition you want to image or restore. The Windows feature is a lot more finicky...
Acronis will reload an image to a new HDD\SDD of a different size than the original, and it will boot... I'm pretty sure the Windows feature will not...