Can i access files from hard drive if running the OS from a bootable USB?
Can I access the files from the internal hard drive if I am running the os from bootable usb?
Depends on the OS. If it's Windows, and you don't have a special driver for reading APFS or JHFS+ volumes, then no. Otherwise, if you've installed macOS on the USB, then yes, provided that either FileVault is off for the computer or you know the login password for it (if FileVault is enabled for the computer).
