When reinstalling an operating system, deleting data from multiple hard drives is unnecessary and will remove important files and software installations. It is better to only reset the default settings of one hard drive in order to retain backups, installed programs, and avoid reinstalling software. A data wipe of all hard drives should only be done if files are corrupted by malware, otherwise resetting one drive is sufficient to resolve minor issues and regain system functionality after reinstalling the OS.

1. Whenever i have software and hardware problems,because the current operating
system of my laptop is almost outdated as well as some of its drivers, i always
reinstall the operating system, but before reinstallation takes place, i deleted the
data on the 2 harddrives first which is not required, because there are no
sensitive data that ought to be deleted. But i am a bit stubborn, i already knew if i
do the harddisk delete data, not only 1 harddrive would be affected, but more
than one. Most computers have 2-6 partitions or drives. The reason for having
several partitions is to backup files, so that if something went wrong with a
computer and the operating system ought to be reinstall, the files still exist, if one
would only recover the default setting of one of the harddrives where most of the
programs are saved.
It is nice to know that i do not need to download and install again the softwares
which were already installed to my laptop, everytime i reinstall its current
operating system, because i only need to make a copy of each software. However,
if i often reinstall the current operating system of my laptop, i must not perform
the harddisk delete data, because even i have several copies of the softwares
installed to my device, they would still be deleted. Anyway, merely recovering the
default setting of one of the harddrives is already sufficient for a computer in
order to regain its functionality. When reinstalling the operating system of a
computer and there is a great need for a permanent deletion of files, because
those files were corrupted by a malware, then one should perform the harddisk
delete data, but if there are only small problems with a computer, then only
recovering of the default setting of one of the harddrives is needed.