The MS version of backup are/were buggy and now wildly odd and complex. (I never even look there due to getting burned by them for 40 years) "once bitten twice shy" or more.?
No back-up is going to work if either or both HDD are bad. (I always test the HDD First using the free smart test here) Or on any Dell PC run F12 ePSA diagnostics.
I only use AMOEI Backupper now.
Criteria of choices to pick a good "BU" Application program or App.
Full Version costs $40 (Jan/2021) and is a life time upgrade (a 1 year -2PC version for $10.69 total USA) prices vary from $49 or less, on sale or with coupons. I used Coupons.
If you need a 3 PC license or more ask them first. (most sellers of software fail in not having 1 page that tells their rules on Licensing, 1,2,3, PC and if the app goes dead or lame in 1year, or not.
Most will tell me , just use the MS cloud and trust it. ( I say trust is earned, and that takes years, even 10 years to see that !)
Never ever backup to only one drive or media for sure C: to C: that is crazy.
HDD fail and do so often, I back up to 1 or more External Drives and 1 local server and one offsite. After backing up the local servers are tuned off, to extend LIFE !
Using BITLOCKER or any kind of built in or added HDD/SSD drive encryption can fail so easy it is not even funny, (don't) Or buy high end, products to do that and pay through the nose.
Source of target Drives are bad or fails SMART TESTS.
Note the very cool and clear to see ARROW below.
That one thing prevents copying data the wrong way, for not doing the horrible act of moving old data over new. (a horror for sure)
Note the clear wording here, and the cute arrow, too, making any user confident the APP is doing what you want !!! 1,2,3, add folder (source) #2, pick target and last #3 start backup.
Joking: (If all else fails backup to here)
version 1. 1-1-2021 (100% only my limited opinions. )