Hi. I have an ACER external hard drive model # AH263 USB3.0. The light comes on when I plug it into any pc. It makes a loud be

Please do not give your posts a long title as the forum software will truncate it in mid sentence (as you can see it has done).
Keep the title short, put all relevant info into the text box. Thanks.

I'm guessing your truncated sentence should say "The drive makes a loud beep". This means the drive has failed and will have to be replaced. The data that's on it? -- well, what can I say. No backups? Very unwise.

If you've got deep pockets (very deep pockets) you can send the drive to a data recovery specialist. Recovery software that's available to download will not help at all.