Log in to your app with an interactive terminal session:
flyctl ssh console
Then, you will be able to navigate the file system and see all the files with cd, ls command-line commands. In this way, you will be able to check if your file is really present on the file system.
If you want something more interactive, you can use Midnight Commander app:
sudo apt-get install mc
And then call it from the command line:
mc
Midnight Commander allows you to navigate the file system interactively in a WYSIWYG manner. The usual cursor keys and the Enter do most of the navigation functions.
Ok, I get the app files by ssh console, but there is no any /gensei_data folder. This folder is located one level up: In ../app folder and my image is there. But still I can’t retrieve it.
As I understand I just should use absolute path like /gensei_data/file.ext, but it doesn’t work.
I share my fly.toml to clarify the situation, maybe it’ll help: