How to save files - to USB connected phone

Iirc this is a security issue with USB connected phones, which don't quite work exactly the same as a simple USB drive. I forgot the details but I remember reading something about sandboxing between the operating system and the phone storage, so it doesn't have anything to do with construct or html5.

Hi,

I'm trying to save files from a desktop app onto my USB connected phone. I've tried using NWJS and also browser.invokedownload. None of these see the USB connected device. Strangly I can use NWJS and filechooser to read from the USB device.

I've noticed that C3 can't see my phone either when i'm using the project save option too.

Is this a fundamental problem for HTML5/C3 implementations, or am I missing something?

thanks

R

It has to be from desktop to mobile right? Just asking since mobile saves to mobile using just localstorage.

Thanks Oosyrag

I had a feeling it's what oosyrag said, a security feature. I tried with other development tools, and when they bring up savefiledialogs, they can't see the USB-connected mobile either. you can read, but you can't write. it sounds like a security feature. you can use the file explorer on windows to copy/paste to the phone, but it doesn't look like an app can do it - no matter how it's created.

i'm sure there's a way, but it's beyond me.

mobile reading from itself = works fine

mobile saving to itself = works fine

desktop reading from mobile = works fine

desktop saving to mobile = does not.

Thanks Oosyrag

I had a feeling it's what oosyrag said, a security feature. I tried with other development tools, and when they bring up savefiledialogs, they can't see the USB-connected mobile either. you can read, but you can't write. it sounds like a security feature. you can use the file explorer on windows to copy/paste to the phone, but it doesn't look like an app can do it - no matter how it's created.

i'm sure there's a way, but it's beyond me.

mobile reading from itself = works fine

mobile saving to itself = works fine

desktop reading from mobile = works fine

desktop saving to mobile = does not.

You could have a storage online this way both mobile and desktop save to the same location? Sorry not quite sure what you are doing, just giving tips :)

thanks, that is a viable solution and is o n my roadmap, but i wanted to avoid that for the moment. I'd need to make sure appropriate security was in place for the online shared space.