Thanks. I am able to reproduce. Strangely, RNFS.hash(file, 'sha256') is not giving the same hash code as let say, shasum -a 256 would give for some files.

Welcome

I will use file size first, as it is a much less expensive operation compared to hashing for large files. If the file size check fails, I will use hashing as a fallback for double-checking.

I also reported the issue here: birdofpreyru/react-native-fs#99

@halawnss btw your issue is not be related to the hash calculation problem, as the file sizes differ from the expected model file size. Does this happen (download interruption) when your app is in the background while downloading?

But this mean we need gracefully deal with the interrupted downloads, like clean up etc, to avoid the confusion.

@a-ghorbani download interruption happened 4 times on 1.6.2 :

• once: immediately when the screen was accidentally turned off (I forgot to set the screen off period to " never ")
• twice: without getting out of the app at all
• once: after a while of running app in background for a short period and then coming back - multiple times - ( in v1.5.9 - which I used to use before updating - , I used to do this a lot and never faced such a problem )