Not sure what it is you're afraid can happen. Drive failure ?
Some programs and Windows will not install on removable drives and may be be able to set them to automatically store data created by programs. It's much better to add a second HDD in the computer if there's room and a free SATA port. Most of the SFF/Small Form Factor and UltraSFF cases don't have the room. I got a new computer last week and don't care for the split of the 1TB HDD, 150GB on the boot/system/C: partition and 780GB on D: partition [too much like Sony Vaio of WinXP days]. I am installing programs I need as I go and so far putting them on D: but there will be some that have to go on C:. I would use Disk Management to change the sizes but there's a 500MB System Recovery partition between them that screws up that idea.
The ASUS X540SA is a laptop and does not have room to install a secondary HDD internally.
As stated, many programs will not run off of an external USB drive. If you get them to install and run off of a USB drive, then if the C: drive fails, none of the programs will work anyways, because they won't have access to the Windows Registry on the C: drive.
It is better to keep a current backup and a Image file of your C: drive on an external drive. If Windows or the C: drive fails, you replace the drive and restore your image, and backup files to the new drive.
If drive capacity is a concern and assuming the external WD drive is a 2.5"one then it's feasible to clone the current internal to the external one etc.
It will take some partitioning and moving of files but it should work.
If you clone or make a (Clone) Image file of your internal HDD to an external drive, you do not have to partition or move any files. The Cloning process makes a mirror image of the internal HDD to an external drive so it is exactly the same.
TS already has data on the external drive. Wouldn't it be more prudent to shrink that drive and use the space created to move the data onto that partition?
I meant "imaging" but wrote "cloning" for some obscure reason.
Programs (except games) don't use much storage space so you have plenty of space left on C for expansion. I would just install all programs & data on C then consider archiving old data to your external USB hard drive or the cloud (e.g. OneDrive). Your programs will open much more quickly from the laptop's drive. A worthwhile upgrade would be to install a SSD in your laptop if you don't already have one.
greetings. thx for replies.. when I tried out my pc's backup option, it was much easier to deal with. so I see the backup folder is saved within the external HDD..but now when I go to restore section, I see there is data being compiled.i wanted to avoid any unnessesary memory usage..can I delete the compiled restore points? iam afraid it will grow to over 1GB.
You could easily fit a full system backup from Macrium Reflect for instance on that portable drive. A file you make like that is about 20 -25% smaller than space taken on disk image is made from.
That way you are safe from any snafus with system drive. Just make a full system disk backup periodically or after some bigger changes.