Question

No bootable device external HDD

So my internal HD cord ripped out of my laptop and I bought an external hdd SATA to plug in my hard drive into it when I try to boot from the external directly it says that no bootable device was found. I changes bios boot order and legacy mode on

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Answer
windows

It will NOT run from removable devices, which means anything on the USB bus. It only runs on the PATA and SATA bus. It's part of their copyright protection scheme in the software. If you want something at least which will run from an removable HDD, then you will need to use Linux. I suggest Linux Mint 18.3 MATE. You can download an ISO from linuxmint.com site, burn the image to a bootable DVD or USB flashdrive, or order a DVD for $6 + postage from osdisc.com site.

Why can't you replace the HDD cord in the laptop?

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Answer
Sounds correct.

Windows in stock form won't boot from USB. A Linux might if the BIOS supports it and is setup right.

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