On very old, slow HDDs (hard disk drives), the CPU can sometimes decompress data faster than the physical disk can read the uncompressed data. The Cons: Why You Might Hesitate
While debatable, constant compression/decompression cycles involve more "work" for the system, though modern SSDs are robust enough that this is rarely a dealbreaker. Better Alternatives to Reclaim Space compressing c drive
However, the benefits of compression are inextricably linked to significant performance costs. The central processing unit (CPU) is responsible for the heavy lifting of compressing and decompressing data. Every time a file is read or written, the CPU must intervene to process that data. While modern multi-core processors are powerful, this introduces an additional layer of computational overhead. On older hardware, or systems where the CPU is already a bottleneck, this can result in noticeable system sluggishness, slower boot times, and lag when launching applications. On very old, slow HDDs (hard disk drives),
However, there are important performance and practical considerations: The central processing unit (CPU) is responsible for
Compressing your C: drive is a . It is an effective way to squeeze a bit more life out of a nearly full drive, but it comes at the cost of processing power. If you have a modern, powerful CPU, you might never notice the difference. If you’re on a budget laptop, you’re better off moving your photos and videos to the cloud or an external drive.
| File type | Expected saving | |-----------|----------------| | Text files, logs, XML | 60–80% | | Office documents (docx, xlsx) | 10–30% (they’re already partially compressed) | | Program files (exe, dll) | 20–40% | | Images, videos, music | 0–5% | | Windows system files | 15–25% | | | 10–20% typical |