Same.

How come this keeps happening?

This often means a project does not have enough spare cash to buy another hard drive, but occasionally means that the servers do not have a good place to attach another hard drive.

If it's the first of these, the project could provide an estimate of how much it would cost to buy another suitable hard drive, plus a way to donate toward that cost.

Ahh yes I did post app_config.xml file which is 100% correct and works. I am running it now. I don't recall editing any app_info file but I use cc_config.xml file to limit projects to one card or another. I used it to run asteroids on a 970 and E@H on a 1070 in the same machine. Before Asteroids released its Pascal capable app. The same app_config.xml file works then and now.

A complex app_info.xml like that is beyond the ability of most GPU crunchers. Some of the theoretical possible configurations also exceed the available BOINC command options.

Running 3 separate GPU projects concurrently on the one box is already quite an achievement. I don't have a computer with 2 or more graphics cards any more so I can't experiment myself.

Had an overclocked HD 5970 and HD 5870 and reached 149th world ranking but they really sucked the juice. When electricity tariffs increased greatly here was forced to reduce the amount of GPU crunching I do. Now even have one box that doesn't have a separate graphics card. Not jelly though, still like to see others enjoying going to town with multiple powerful graphics cards.

You ask for an app_info.xml file and then refer to an app_config.xml file.

They are different. If you get them mixed up it will cause you confusion.

For example an app_info.xml file requires BOINC to be stopped and restarted before it works, whereas an app_config.xml file can be activated by clicking "Read config files" option in BOINC Manager. An incorrectly configured app_info.xml file will immediately delete an existing cache of tasks as soon as BOINC is restarted.

<app_config>
  <app>
    <name>period_search</name>
    <max_concurrent>4</max_concurrent>
     <gpu_versions>
      <gpu_usage>0.5</gpu_usage>
      <cpu_usage>0.2</cpu_usage>
     </gpu_versions>
  </app>
</app_config>