For me, adjusting the 2 values was not enough. If the file is too big, you also need to adjust the execution time variables.
First, ../php/php.ini
upload_max_filesize=128M
post_max_size=128M
max_execution_time=1000
Then, ../phpMyAdmin\libraries\config.default.php
$cfg['ExecTimeLimit'] = 1000;
This did the trick for me. The variables can be choosen differently of course. Maybe the execution time has to be even higher. And the size depends on your filesize.