Bootable USB not reading

[cilkcreates]

I have just replaced my laptop HDD with an SSD and when I plugged in my bootable USB it says “No bootable device - Insert boot disk and press any key” even after I press a key. My laptop is an Acer es1-521.

 

[vapour]

Go to BIOS, see if it has option to set up Boot device ranking. If usb is not on the list, add it.