A CD or DVD drive will take about 20 to 30 watts and a hard drive consumes between 15 and 30 watts.
Source: https://smallbusiness.chron.com/many-watts-power-supply-enough-71452.html#:~:text=Typical%20Power%20Requirements&text=A%20CD%20or%20DVD%20drive,memory%20requires%20about%2015%20watts.
Also, with a USB 3.0, it can provide up to 900mA or 0.9A, which translates into 4.5 watts. These power output specifications are a rating based on the 5 volts from each standard output. However, the USB 3.0 dedicated charging and charging downstream ports provide up to 1,500 mA or 1.5A, which translates into 7.5 watt
Also, with a USB 3.0, it can provide up to 900mA or 0.9A, which translates into 4.5 watts. These power output specifications are a rating based on the 5 volts from each standard output. However, the USB 3.0 dedicated charging and charging downstream ports provide up to 1,500 mA or 1.5A, which translates into 7.5 watt
Source: https://resources.pcb.cadence.com/blog/2020-what-are-the-maximum-power-output-and-data-transfer-rates-for-the-usb-standards#:~:text=Also%2C%20with%20a%20USB%203.0,which%20translates%20into%207.5%20watts.
What's the WATT / power output of USB 2.0 and USB 3.0É
500mA x 5VDC 2.5W for USB2, 900mA x 5VDC 4.5W for USB3 -- These are MAX values. That data was in the table on the Wiki page
Source: https://forums.tomshardware.com/threads/whats-the-watt-power-output-of-usb-2-0-and-usb-3-0.2805340/
Wiki: https://en.wikipedia.org/wiki/USB#Power