I'm adding some pictures to my portal, and place these in the folder Portals/0/fotos
After adding some directorys (about 25 with a total of approx 500 pics) i press synchronize database.
After some time i get the following error:
Request timed out.

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.Web.HttpException: Request timed out.

Source Error:

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

Stack Trace:

[HttpException (0x80004005): Request timed out.]

Hmm, i changed the value to a much higher value (1000000) but stil get the time out? Something else i have to do??

It all kind of also depends on the size of the upload and the speed of the connection.  If you are uploading a hugh file over a 56k modem link the IIS session is going to expire and the upload will timeout.

I'd say anything much over a MB or two you should probably be using FTP.  It's quicker, safer and has less resource overhead on the server.  And you won't get IIS session timeouts.  :)