Windows 10: PC Won't Boot Normally Without External HDD

HDDs in Question:- SSD, containing the OS 500GB- Original HDD 2T- New HDD 4TMy PC was running low on memory, so I purchased a new Internal HDD 4T to replace the 2T HDD. I also purchased a 5T external to copy the files from the old HDD. I used Macrium Reflect to clone the old HDD to the external. Once I did this, I removed the old HDD from the PC and swapped it with the new one. The PC now only boots into BIOS unless either 1. the external remains plugged in or 2. I take out the new HDD and put the old one back in.I'm not sure what is on the external that is not allowing the PC to boo

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Boot from external USB HDD

Hello!

Any laptop should be able to Be booted from an external HDD.

You can check this back accessing your BIOS and then checking if the BIOS gives you an option to boot from USB.

If that option is listed, then you're good to go!

 

External HDD showing on W10 but not on W11 (usb port are fine)

I only suggested using the other PC in case you could not back up your files to the Windows 11 PC.

Are all HDD's not working on the Windows 11 PC or just external USB?

What normally works for this is what I gave you, so I'd at least try it if the other steps I gave didn't work.

 

Windows keep booting into Bios when I unplug my external HDD

Hi,

My windows keep booting into Bios when I unplugged my external hdd.

I've checked the boot priority and it's set to boot from my C drive, but when I unplug the external HDD before starting up, it just can't boot normally.

I can boot just fine with the external HDD plugged in.

I have the external HDD before I got my current PC, so I'm certain it doesn't have my operating system inside.

I can't seem to figure out a solution. Need some advise whether or not I should reformat my PC, and if so, how should I format my PC without a pendrive?

Thanks in advance.