You need to send the dump files directly to avast - Upload any minidump or memory.dmp files, zipped to reduce size. Give the zip file you are uploading a unique name (e.g. forumusername-mem-dump.zip, etc), so they can identify it. It might not be a bad idea to create a text file (readme.txt) with any relevant information, avast topic URL, user name, etc. etc. in the zip file. Not to mention posting the name of the file you uploaded in the topic acts as another searchable reference.
Memory dump locations, Mini Dump files in, C:\Windows\Minidump\ - Full Kernel dump file, C:\windows\memory.dmp
Using Windows Explorer, Connect to the link and drag the file into the Right pane and drop it, that starts the upload, you don’t have read access to this folder. Or
Upload it using the Run command-line in Windows: Windows Key + R (to get the run box), copy and paste this [nobbc]explorer ftp://ftp.avast.com/incoming[/nobbc] and drag the file into the window, from another explorer window.
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Excuse me if I’m teaching your granny to suck eggs:
First you have to create your zip file with the unique name, containing the dump files and the readme.txt file, before you even consider connection to the ftp location [nobbc]explorer ftp://ftp.avast.com/incoming[/nobbc]. You do not have read permissions on the [nobbc]explorer ftp://ftp.avast.com/incoming[/nobbc] location, so you won’t see it has been uploaded.
Now you make your first windows explorer connection to the ftp link [nobbc]explorer ftp://ftp.avast.com/incoming[/nobbc], now open another explorer window where you locate your unique zip file containing the dump and readme.txt files; drag and drop that file into the other explorer window (right hand side), no need to click enter or any other action.