Why do we still use hard drives and SSDs for computers, when SD cards can hold like a TB of data in a tiny package?

Question

I’m kinda curious as to why everything hasn’t just shifted over to these tiny, affordable little guys. They can have so much on them!

In: Technology

Answer 1

SD cards have slow read/write speeds. 40mbps is average for a SD card, compared to a “average” SSD’s 4,000mbps

SD cards cannot withstand as much write cycles before failure. An sd card stuck into any device that constantly writes to it, like a dashcam, will usually fail within a year unless you buy special endurance ones. A SSD can typically take constant writes for many years in comparison.

SD cards are limited to the speeds of USB adapters or SD card slots, a UHS-II SD card maxes out at around 300mbps, so you simply cannot go faster without making a new interface/standard.

Due to their small size, they cannot dissipate heat well, so during intense read/write sessions, they will heat up and degrade faster.

SD cards are often made with cheaper components with lower lifespans.