You could format two hard drives at same time but both need to be connected by the sata connector cable.
By formatting the hard drive.
To completely clear your external hard drive: On Windows: Connect the drive to your PC. Open File Explorer, find your drive under "This PC." Right-click on it and choose Format. Select a file system (NTFS or exFAT) and choose Quick Format (or leave unchecked for a full format). Click Start to erase everything. For a more thorough wipe, use software like CCleaner, Coolmuster Data Erasure, or DBAN to overwrite the data so it can’t be recovered. On Mac: Connect your drive to your Mac. Open Disk Utility (Applications > Utilities). Select the drive from the list and click Erase. Choose your file system (Mac OS Extended or exFAT). Click Erase to format it. For secure erasure, click Security Options in Disk Utility to overwrite data. Just make sure you're erasing the right drive, because it's permanent!
Yes.
Yes, formatting a computer hard drive will delete the operating system.
Formatting - removes all the existing information from the computer's hard-drive. Think of it as the electronic equivalent of using an eraser to rub-out all the writing on a piece of paper.
you can verify that a particular hard drive is error free by verifying the integrity using window98 bootable softwares. And again, proceeding by formatting with window98 bootable software.
Of course, copy all your programs and files you need from the old hard drive and put it on your new hard drive BEFORE formatting the old hard drive. Formatting your hard drive will mean losing everything and a slim chance of getting it all back.
Yes.
It will depend on what formatting system was used for the hard drive. If it uses FAT-32 format then it will work with a Mac but with the limitations associated with FAT32 formatting (file size/naming etc.). If you own the drive and are only using it with the Mac you can reformat it (using Disk Utility found in the Utilities folder within the Applications folder) as a Mac OS Extended (Journaled) drive.
Yes, Surely it will remove everything on hard drive. Formatting a hard drive means to remove everything on hard drive. If you are formatting only a specific drive like C:\ or D:\ then the data in only that drive will be removed.
While formatting in word processing applications, Hard formatting deals with formatting a few pages of a document using tool bars icons, keyboard shortcuts keys and menu bars whereas soft formatting deals with formatting a large number of pages using styles.
It wipes out data on the hard drive disk.