Starting from Android KitKat (4.4), downloaded apps are only allowed to write to a certain part of a removable SD card.
When you change the location of stored recordings from the app Settings, choose “App folder on SD Card”.
Then when you want to access the recordings on the SD Card directly from your PC, the folder is located in: Android > data > com.hiqrecorder.full > files > Recordings. Alternatively, use the Wi-Fi Transfer feature to move the files to your PC.