Please can I use external hard drive instead of flash to boot an os on my pc

Saskay44:
Please can I use external hard drive instead of flash to boot an os on my pc

No,Hard drives are in NTFS file system format while flashdrives are in FAT32 format.
NTFS is created by Microsoft,the HDD with NTFS file system works on Microsoft only,for transfer or receiving data.
FAT32 is also created by Microsoft but more universal,you can use storage devices in FAT32 file system eg flash drive to transfer or receive data from Microsoft,Linux or Mac OS.
So if you want to boot from external storage device,you have to use the ones that are in FAT32,or else it won't boot.
Also you can convert a storage device with FAT32 to NTFS without formatting,but you can't convert NTFS device to FAT32, unless you format it.
I have 2 flash drives,one has Ubuntu 20 and the other windows 20H2 on them,I burn the OS on the drives using Rufus.

Greatzeus:

No,Hard drives are in NTFS file system format while flashdrives are in FAT32 format.
NTFS is created by Microsoft,the HDD with NTFS file system works on Microsoft only,for transfer or receiving data.
FAT32 is also created by Microsoft but more universal,you can use storage devices in FAT32 file system eg flash drive to transfer or receive data from Microsoft,Linux or Mac OS.
So if you want to boot from external storage device,you have to use the ones that are in FAT32,or else it won't boot.
Also you can convert a storage device with FAT32 to NTFS without formatting,but you can't convert NTFS device to FAT32, unless you format it.
I have 2 flash drives,one has Ubuntu 20 and the other windows 20H2 on them,I burn the OS on the drives using Rufus.

thanks for this