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I try to transfer files from remote computer using ssh to my computer :

scp My_file.txt user_id@server:/Home

This should put My_file.txt in the home folder on my own computer, right?
I get

scp/Home: permission denied

Also when I try: ...@server:/Desktop, in order to copy the files from the remote computer to my desktop.

What am I doing wrong?

Your commands are trying to put the new Document to the root (/) of your machine. What you want to do is to transfer them to your home directory (since you have no permissions to write to /). If path to your home is something like /home/erez try the following:

scp My_file.txt user_id@server:/home/erez/

You can substitute the path to your home directory with the shortcut ~/, so the following will have the same effect:

scp My_file.txt user_id@server:~/

You can even leave out the path altogether on the remote side; this means your home directory.

scp My_file.txt user_id@server:

That is, to copy the file to your desktop you might want to transfer it to /home/erez/Desktop/:

scp My_file.txt user_id@server:/home/erez/Desktop/

or using the shortcut:

scp My_file.txt user_id@server:~/Desktop/

or using a relative path on the remote side, which is interpreted relative to your home directory:

scp My_file.txt user_id@server:Desktop/

Edit:

As @ckhan already mentioned, you also have to swap the arguments, it has to be

scp FROM TO

So if you want to copy the file My_file.txt from the server user_id@server to your desktop you should try the following:

scp user_id@server:/path/to/My_file.txt ~/Desktop/

If the file My_file.txt is located in your home directory on the server you may again use the shortcut:

scp user_id@server:~/My_file.txt ~/Desktop/

I came here for "Transfer files using scp: permission denied" because I had the same error.

In my case, the file downloaded with scp would have overwritten a file owned by root, and I wasn't root. In short, check the ownership of the file being overwritten.

this seems to be like permissioning issue

The file might not have read permissions as it is delivered to the destination server as the source account.

you need to ensure the file at the source has required permissions especially read permission

-rw-r--r--

chmod 744

then scp the file to destination. This will be resolved

What fixed the "permission denied" for me was, on the remote server, change the folder ownership to root: (This can happen when you are sending a file to a non-root user, and the directory is owned by root!)
On the remote machine (copying dest.):

sudo chown (your username) (remote folder)

Also to be sure, enable all permissions on the remote folder: (Not always necessary):

sudo chmod 777 (remote folder)

You have the arguments to scp reversed. It's source first, then destination, like cp.
man scp for more details.

Permisssion Denied means you are not the root of the server. You just hold an account there. So in that case you need to do this:

sudo scp -r /path2yourFolder/ username@server_Ip:/home/username

This will copy to your home directory on server.

This will also work:

scp -r /path2yourFolder/ username@server_Ip:~/