Just to note, regardless of the details of the issue, the ideal way to resolve this issue is to ask Android for the right external files dir. I think something like the following should work:

from jnius import autoclass
Environment = autoclass('android.os.Environment')
external_storage_dir = Environment.getExternalStorageDirectory().getPath()

Even better, you can similarly get the external files directory that is dedicated to your application, does no require special permissions to write to, and will be cleared on uninstall.

good to know; i think sdcard is generally safe but this would be ideal (my android uses 'emui' and for some reason its unbound the sdcard folder :/). ill investigate that as an alternative

inclement's solution worked perfectly. saved me some processing power and some storage space. thanks

@JellyWX could you please paste the path you got from Environment.getExternalStorageDirectory().getPath()? I'm curious what was the final path as at least one from

/storage/emulated/0
/storage/emulated/legacy
/sdcard

always worked for me.

@KeyWeeUsr I believe it returned

/storage/6537-3031

My phone is a Huawei model, and when I added an SD card to the storage, for some reason the modified OS unbound the sdcard folder and made the /storage/6357-3031 folder. I have no idea why... but luckily the getExternalStorage works perfectly (unlike the JsonStore itself, it seems. I'm fighting with it as I type this)

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Oh my... well, I've seen just slightly modified path (e.g. /storage/emulated/1, /storage/emulated/sdcard), but there was always some symlink to the real one. Quite lovely this one.

About JsonStore, I will try to look at it this weekend and see what's wrong with it.

@KeyWeeUsr thanks :) I was looking at it myself before, but got sidetracked and couldn't nail some of the code used. I'm having some issues where the store only updates in memory it seems, but sometimes it works sometimes not. If i make a reproducible example I'll file a different issue for it

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@JellyWX I can't really reproduce your issue. Pure j = JsonStore('somewhere') doesn't trigger anything for me both on py2 and py3 with the latest stable (1.10.0).

The only error I get is when I actually try to put something into the storage, therefore when I do:

j = JsonStore('somewhere')
j.put('something')  # error here

which throws an IOError on Android for me and when I try to catch the error, everything works just fine:

try:
    j.put('something') 
except:
    pass

which leads me to conclusion that you only tried to catch the error on a wrong place, which even appears to be true:

try:
    store = JsonStore('/sdcard/data.json')  # no error here, nothing to catch
except:
    try:
        store = JsonStore('/storage/emulated/0/data.json')
    except:
        store = JsonStore('data.json')

# missing line for the example
store.put('whatever')  # crash boom

# the same folder as the first "store" variable
I python  :  IOError: [Errno 2] No such file or directory: '/sdcard/data.json'