I'm trying to set up Ubuntu 20.04 on Oracle VirtualBox 6.1.6. During the installation, I got the following error message:
The installer encountered an error copying files to the hard disk: [Errno 5] Input/output error This is often due to a faulty CD/DVD disk or drive, or a faulty hard disk. It may help to clean the CD/DVD, to burn the CD/DVD at a lower speed, to clean the CD/DVD drive lens (cleaning kits are often available from electronics suppliers), to check whether the hard disk is old and in need of replacement, or to move the system to a cooler environment.
I downloaded the file from the official Ubuntu website and multiple times, but none of the files works. I also verified the iso using
echo "e5b72e9cfe20988991c9cd87bde43c0b691e3b67b01f76d23f8150615883ce11 *ubuntu-20.04-desktop-amd64.iso" | shasum -a 256 --check, but it doesn't do anything.