Windows 10: How to manage installations when C drive is SSD Boot Drive

This isn't a question pertaining to installing Windows specific files, but general installation of programs and apps on a system with a maxed out C drive thats an SSD Boot Drive with only 100gb capacity, and a empty D Drive that is an HDD with 1TB capacity.

I bought my wife a laptop from Dell. We installed the usual stuff, Antivirus, Adobe, Microsoft Office, and sims. My wife tried to copy over some pictures and music, only to get a Storage Full message.
When I realized what was going on, I had no idea how to address this. How do you work with a computer whos default drive for everything is only 100gb?
Is there a way to reroute default directories to the D drive?
I need some serious help here. I mean, every time my wife wants to install a game or program, every times she wants to install filters, add-ons, scripts, patches, and other assets, every time the computer says there's an update...
How the heck do you address all these things?
I called Dell, and they were absolutely NO help, merely repeating the specs and the purpose of having the SSD drive.

Please please please help

:)

 

Cloning to SSD then swapping drive letters


@SamHobbs
What you want done is very simple and can be done in short period of time. Here's my suggestion:
There's 2 modes that Windows can be installed: UEFI and the old legacy MBR. Open Disk Management, look at the disk where your C drive is, if there's a

1. EFI System Partition, your Windows was installed using UEFI.
2. System Reserved partition, your Windows was installed using MBR

Next, Connect your SSD to an available Sata port (no need to format or do anything). Download: Macrium Reflect Free . Install and run. Follow the steps below:

1. From Macrium, click on image this disk under your C drive and save it to either an Internal or External Drive. This will create a single backup image of the whole disk containing your C drive.
2. Again, from Macrium, click on Restore tab and select the image created from step 1, Select your SSD as the destination drive, click Next->Finish
3. Exit Macrium. If your Windows was installed using MBR, Open disk management and make sure the SSD is marked "Active" else go to next step.
4. Shutdown your PC. Disconnect the HD containing Windows C drive then connect your SSD to it.
5. Reboot. Your PC should boot and the Windows should have C as the drive letter.

NOTE: The procedure above is to backup your Windows to an image file then copy it back to the SSD. This ensures proper cluster size aligment for the SSD. In addition, Macrium also perform Trimming for the SSD. This is more preferable than cloning.

 

Installing an SSD drive on my desktop to use as the C bootup drive

What are you talking about, I have Samsung 830 for 5 years and its still running great there is no issue with NTFS and SSD

To the OP all you have to do is use Macrium Reflect to clone your disk to your SSD you'll have to option to shrink your C partition before you start the actual clone check out this video
it walks you through step by step

 

SSD as Boot Drive? How?

Well, I have Windows installed on the SSD, along with the drivers and browser. Now, I'm trying to install other stuff (Steam, games, etc.), but the mechanical drive isn't showing. I'm sure I missed a step?