tecno4

By default, Raspberry Pi boots up and stores all of its programs on a microSD memory card, which has rather limited bandwidth. On the Raspberry Pi 4, the memory card slot can achieve a theoretical maximum of 50 MBps, which is double the 25 MBps maximum on the Pi 3B+ (and other 3 series). you get more speed if you attach an external drive to one of the Raspberry Pi's USB ports, especially with the Pi 4 offering USB 3.0 connections that have a theoretical maximum of 660 MBps. While we got around a third of that maximum in our real-life tests of a Raspberry Pi 4 with SSD, we were still impressed with how much faster app opens, web serving and file copying took place.