A simple dummy question

Hello Everyone!

changing from Microsoft to Macintosh, I connected my hard disk (nearly full) to the apple computer, which could not recognize it. I was prompt to "initialize it", unfortunately I DECIDED YES!!, but just for 1/100 of a second: now I cannot access the hard disk at all.
Is still possible to recover the data?

tks for helping

netto68

Do not do anything else to the disk until you have a plan of action. You might try File Scavenger or contact Que-Tek, who makes File Scavenger, about their recovery services. There are other recovery programs and recovery services. You can google for them. But trying a recovery tool, then trying a recovery service is your only reasonable path.

And then look into a backup package. You need to have backups of your files. A disk can drop dead at any point in time.