Accessory Port Layout and Performance
The left side, from back to front, features the power port, micro HDMI port, headphone jack and power button.
The right side, from back to front, features two USB 3.0 ports and an SD card reader. The Acer Aspire S7-191 does not feature any USB 2.0 ports, thus testing was unable to be run.
In terms of USB 3.0 read performance, the Aspire S7-391 is the slowest system we've tested. It managed an average read speed of just 78.4MB/s. 70 percent of systems we've tested manage above 100MB/s.
In terms of USB 3.0 write performance, the Aspire S7-391 is still at the bottom of the stack, managing just 90.5 MB/s average write speed.