How to call data from file seperately?

Its a diary app.The new entries I made is saved in a file . Now how can I call the entries separately? Like I saved 3-4 entries now when that entries shows in a list how can I select one entry and view the notes saved in that entry? And how to delete the selected entry from a file?

You may want to publish your blocks so that others could assist you. If this is like a diary app? If so, there are many walkthroughs on youtube which you could follow tailor to your needs.