Thanks for answering! I tried to follow those instructions:
http://localhost/phpmyadmin/Documentation.html#faq1_16
I changed:
max_execution_time = 300000
max_input_time = 600000
memory_limit = 210M
post_max_size = 210M
upload_max_filesize = 200M
But in phpMyAdmin it still says:
Location of the text file [choose file] (Max: 2,048 KiB)
EDIT: I restarted Apache and now it says (Max: 205 kKiB) - but it still doesn't seem to work. I get a progress bar in my browser for about one or two minutes, then it stops, and, nothing...