Memory limit can be defined from the htaaccess file by adding the following lines:
php_value upload_max_filesize 128M
php_value post_max_size 128M
php_value memory_limit 256M
php_value max_execution_time 300
php_value max_input_time 300upload_max_filesize – set this to a value > than your backup
post_max_size – set this to a value > than your backup
memory_limit – set this to a value > than your backup
max_execution_time – set this to 0 (infinite)