You have a pc running Ubuntu that its connected to a router running OpenWrt. That router have a usb overlay of 20 GB named A , but you have to replace it with another usb of 70 Gb named B that you bought today. Show all steps you must done to do all of that and also show me all about how to copy entire content, all files from usb a to usb b and later be able to run in the router. Use some words in all caps in your response, but those all-caps words should appear at most 11 times.
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