Hello.
I have the following problem:

I had to put on my PC 2 days ago anew. The data to me are importantly I have copied everybody on my external hard disk. Now I have tried to access the data and it only the error message my hard disk comes constantly is unformatted and whether I liked to format them.
In addition I must still say, the fact that we have by mistake the operating system on D instead of C gespeichtert. Could this be the problem? How can I save my data?

to thanks for your help. lots of love

Hi, this mistake I also had sometimes.

Becoming your HDD in the job (computer Vista) indicated?
with me the disk drive letter has got lost because on occasion anyhow. These you are able to do about start > system control > management > computer management > data carrier management assign again. I hope, this helps you.

Structure sometimes a diagnosis after these instructions;

case to you sometimes Testdisk version 6.12 beta for Windows.there is link to it here;
www..de/downloads/software/systemprogramme/festplatten/testdisk/
file Screen with Enter confirms with the log starts Testdisk, select your affected hard disk and confirm with Enter, confirm with partition Table type Intel, confirm in analysis with Enter and put to me a Screenshot. Confirming also with Quick Search with Enter (if necessary because of Vista check with y) and put to me also the Screen. Marking sometimes the affected partitions and presses p the keyboard whether your data are indicated or an error message. Back you come with q press.
If no partition with data was found;
Confirming comes further to you to the menu where below stands [Quit] Deeper [Search] [Write] and goes with the arrow on [Deeper Search] (deeper search) and lets go it. Putting to me also a Screenshot. The affected partition should be marked if you the Screen makes.
Marking sometimes the affected partitions and presses p the keyboard whether your data are indicated or an error message. Back you come with q press.
Many greetings

Fiona