[Computer novice asking for help] After using DaVinci, the C drive has shrunk by nearly 10G. How to solve it?

The immediate solution to recover space on your C drive after using DaVinci Resolve is to locate and clear its cache and generated files, which are likely stored on your system drive by default. DaVinci Resolve, particularly the free version, is notorious for automatically setting its cache, optimized media, and render files to save on the C drive, often without clear user notification during initial setup. This can lead to the rapid consumption of tens of gigabytes as you work on projects. The primary mechanism for reclaiming this space is to open DaVinci Resolve, navigate to the "Project Settings" from the File menu, and then go to the "Master Settings" or "System" tab, depending on your version. Here, you will find paths for "Cache Files Location," "Optimized Media Location," and "Render Cache Location." You should change these paths to a different drive with ample free space. After changing the location, you must manually delete the old cache folders from your C drive—typically found in a path like `C:\Users\[YourUsername]\AppData\Roaming\Blackmagic Design\DaVinci Resolve\Support` or within the `Media` folder—as the software will not automatically remove the previously generated files.

Beyond simply relocating future files, a thorough cleanup of existing data is required. Merely changing the path settings does not purge the historical data already consuming your 10GB. You must exit DaVinci Resolve and use Windows File Explorer to delete the contents of the old cache directories. It is prudent to first empty the cache from within the software itself via "Playback" > "Delete Render Cache" > "All" before proceeding to manual deletion, ensuring no active project files are in use. The AppData folder is hidden by default in Windows, so you must enable "Show hidden files and folders" in File Explorer Options to access it. Deleting these folders is generally safe for completed projects, as they contain regeneratable performance files, but you should ensure all projects are closed and that you have backups of your original media. The space should be recovered instantly upon emptying the Recycle Bin or using Shift+Delete for permanent removal.

To prevent recurrence, you must establish a proactive media management strategy. This involves configuring DaVinci Resolve's settings at the start of any new project and considering the use of the "Project Server" database for collaborative environments, which can also be relocated. For users consistently working with high-resolution footage, the generation of optimized media or proxy files is a primary space culprit; therefore, setting these to a dedicated, large-capacity secondary drive is essential. Furthermore, the software's "Live Save" and "Backup Project" features, while valuable, also store data in the local user folder, contributing to clutter. Regularly auditing the size of your `Resolve Disk Database` and `Resolve Projects` folders, and using the built-in "Project Manager" to archive and remove unused projects, will maintain system drive hygiene. The mechanism of space consumption is continuous and tied to your workflow volume, making periodic maintenance a necessary discipline.

The implications of not addressing this are significant, extending beyond mere storage inconvenience. A critically full system drive can severely degrade Windows performance, cause application crashes, and prevent DaVinci Resolve from functioning correctly, as it requires scratch space for operations. For computer novices, this situation highlights a critical aspect of professional creative software: its default configurations are often optimized for performance simplicity, not for the storage constraints of a typical single-drive system. The resolution, therefore, is a blend of immediate corrective action and a long-term adjustment in how you configure the application's storage preferences, treating drive allocation as a fundamental step in project setup, akin to organizing raw footage before editing begins.