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Have you checked for and found the exact Folder or Folders they are going into? You may need to also look in C:\Users and your_name Folder/subFolders.
Peregrine You dont say how you are saving them.
When saving data files, I always give the PC some direction, example Resume.dox "Save As" Data D:\Documents.
A great way to see how your disk is being used is Wiztree (free).
Mouse over the coloured map to get a path, file and size, rt click to get a context menu.
Files in a particular folder are all grouped in a single square or rectangle which is highlighted on hovering over it.
To clarify, are you certain the use of C: is growing because of you downloading things or creating them, or in a manner not under your control?
By default Documents, Downloads, Pictures etc are under your profile and will be on C: as are many other temporary and program-related folders.
117Gb is not large, if it is to included Windows, installed progs and data.
I simply don't make personal use of the default library folders. Some people make troublesome mistakes if they relocate these to another drive- possibly irreversible. So I have created 'My folders', 'Photos' 'Music' 'Downloads' on a separate drive, and my browser downloads by default to Downloads.
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Considering your title 'going in to the Operating system' note that C: includes, by default, Documents, Pictures, Downloads, Videos and many other items related to user installed programs, your browser favourites, history, email if you use a client etc etc.
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If you have hibernation enabled (not really needed normally with a SSD) you could instantly recover space by disabling that (also disables fast startup which again is rather redundant with a SSD - see the big blue square).
Last edited by dalchina; 08 Oct 2018 at 04:21.
I think that OP's issue is not as much to find out what is taking storage space on C: drive, but rather that the drive is getting full simply because he / she saves everything on user profile folders which currently reside on C:.
This tutorial shows how to move your Documents folder from C: to D: drive: Documents Folder - Move Location in Windows 10 | Windows 10 Tutorials
Repeat the process shown in tutorial moving your Downloads, Music, Pictures and Videos folders to D: drive, too.
Kari
Probably so and I've commented on that.
Given a smaller SSD, worth seeing where the space has gone to get some control.By default Documents, Downloads, Pictures etc are under your profile and will be on C: as are many other temporary and program-related folders.
Also expect the PC to be relatively unusable presently given the very small amount of free space.
@Peregrine - please be very very careful if you use the tutorial Kari has recommended. If you don't, it's possible quite easily to make mistakes which can be difficult (in some cases MS claims impossible but Bree here did it for a user after several days of experimentation) to recover from.
Strongly recommended (as usual) - create/update disk images before doing this - Macrium Reflect (free) + external storage.