HomeIf you just plan to add hard drive capacity for your computer, you can simply add another hard drive. If you plan to enlarge primary hard drive, you need to replace it with a bigger one.
Note: if you decide to replace your hard drive, for data security, you'd better backup your hard drive first.
This article introduces the way to replace hard drive with disk clone software.
1. Backup the whole hard drive
To replace hard drive is just to transfer all the data on original drive to the new drive. It's considerable to backup your old drive to an image file, and then recover the data to your new drive. It's suitable for replacement of both common data drive and system drive.
Summary: the advantage is that you can save the image file to any place, and recover the image when you are ready. There is no time limit to perform this way. While, the disadvantage is that you may spent longer time for you have to do both backup and restore.
2. Clone hard drive
Another solution to replace hard drive is to clone disk, with which you can easily transfer all your data and get a new larger-capacity hard drive with system and all applications and programs installed. You can directly transfer all the information of the original hard drive to a new one.
Summary: it's optional to clone every sector of the original hard drive to the new one, or only clone the used part. It's time-saving and convenient.
EaseUS Todo Backup is a comprehensive data transfer and disk upgrade freeware for home and business users. Besides backup functions for file backup, system backup and network shared files backup, it also provides clone function to clone partition and disk.

Step-by-step tutorial: How to clone hard drive with EaseUS Todo Backup?
Disk clone video tutorial: How to clone Windows 7 with EaseUS Todo Backup?.
Tips:
1.For data security, you'd better backup your disk before disk clone operations.
2. You must connect another hard disk to your computer.
3. If you want to transfer the whole system to another new computer with different hardware configuration, you can use Recover to dissimilar hardware.
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