What are those text files found in the logs folder?

Hi-Q MP3 Voice Recorder leaves log files at this folder:
Android/data/com.hiqrecorder.full/cache/logs on your external storage (SD card or USB storage).

It contains the latest operations done in the app. When you go to the app Settings > Troubleshooting > Send device info, they will be sent together with the system report to help us identify and find solution to the problem you might have encountered.

You can delete them any time. Moreover, if Android detects that you need more disk space, it will automatically delete those files.

On certain Android versions, you can also delete those files by going to the system settings > Storage > tap on “Cached data” and you will be asked whether you want to clear them.