Just something I remembered [late] that's useful here (this is what happens when you don't study IT knowledge for years and tend to make little use of it in daily life to recollect, equipped with potentially no time, a completely unrelated profession and a heck busy life.
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Data recovery is much much more advantaged for drives that are partitioned and allocated separate partitions for programs/windows/swap file/data, and thus in effect data loss is by far more minimal. A partition physically dissects a HDD into separate parts. Why it's advantaged is, because as you bootup/shutdown your system (minimal practice) there are many small files written to the HDD. If you have utilized good practices and well planned disk management, the bootup will be involve a totally different partition than where the data is, thus the data drive partition is not affected nor written/read from/to, and any files that are deleted/lost that you may need to recover, can still be accessed pretty easily, with a very high chance of full recovery (you'll see data recovery firms mention this in essays). Data loss is also more minimal based on this principle where the HDD corruption of a few program/temporary/swap/windows files does not affect your data partition or files.
This also goes for general system scans (especially deep), bootup speed and HDD performance (by far, believe me, mine has corrupted to SMART status 'Good' from 'Excellent' during overclocking in the past week and the bootup now takes 3 minutes 20 seconds, up from 15 seconds!). If one partition is corrupting, another (unless physical) will not be affected and neither the access to it or it's performance degraded.
Same principle with fragmentations and physical drive errors.