I had trouble importing the 3000+ accounts. The tool would simply stop importing.

I figured out that I could look at the dashboard on my website, and see if the number of accounts there was still increasing. 

But having read this topic, I checked the database, and when no more accounts were getting added in sys_accounts, i restarted the tool. had to do that about 10 times, now all accounts have been imported :) 

Now I imported the photos and albums. Those also stopped transferring after 400 - 500 items each time. 

I contacted my hosting provider TMDhosting, they added the following to my website's .htaccess file:

php_value max_input_vars 10000

After that the problem was solved 😌