Hi,
I install boinc ( 7.16.5(x64) ) on my windows 10 pc on disc C: but there is not so much space left on it. Can i move the data on a directory on another disc?
Thanks.

Yes, you can, but it's a little involved. I'm assuming you know exactly where the data folder is on drive C: (usually C:\ProgramData\BOINC).

1) Do an orderly shutdown of BOINC, so no science apps are running.
2) Uninstall the BOINC program, using Settings --> Apps. This removes the program, but leaves your data unchanged.
3) Move the whole data folder, including all subfolders, to your new location. It doesn't have to have the same name - mine is D:\BOINCdata
4) Re-run the BOINC installer. Pause on the page where the folder locations are displayed.
5) Click the 'Advanced' button on the bottom-right corner of that page.
6) Choose the new location for the data folder (second item). If you want, you can choose a new location for the programs too.
7) Continue through the normal installation process.

Next time you start BOINC, it should pick up exactly where it left off, including tasks in progress.

The only thing likely to go wrong is if you don't tell BOINC exactly the right place, to match where you put the data folder. They must be the same!

Hi, Thanks for your answer
I don't understand when you talk about the data folder. On my computer the program is installed on drive C:\Programmes\BOINC
But it's size is small (22Mo)
I don't find where the program put the data.
Do you know how to find it?
Thanks again.

The default location for Windows 7 and Windows 10 is

C:\ProgramData\BOINC

Unfortunately, Microsoft has made C:\ProgramData a hidden folder :-(

You can either search for 'File Explorer Options' in settings, and make all hidden folders visible (on View tab in File Explorer Options dialog)

or paste C:\ProgramData into the address bar in File Explorer.

OK Imanage to find the program data folder. So I try to do what you say and I told you back.

Hi,
Thank you very much
All works fine.

Like we say in my country (France) : Nickel frérot!!