Access Application Private Files in Android

I came across an application that I want to explore it's private files (especially the downloaded media files) and after searching some try and error I found that an easy way to to it is by using ADB tools to backup the application to my PC and then decompress and decrypt  the backup file (because my mobile is encrypted and so the backup must be encrypted too) and then extract the media files :)

1- I used this ADB installer so I don't have to install the full SDK.

2- Then I downloaded android-backup-extractor to extract the the backup file.
3- if you are using Java 8 Update 161 or later skip this step as Oracle's release notes for Java 8 Update 161, stated that unlimited cryptography is enabled by default.

and to be able to decrypt the backup file you will need to download Java Cryptography Extension (JCE) Unlimited Strength Jurisdiction Policy Files 7 or  Java Cryptography Extension (JCE) Unlimited Strength Jurisdiction Policy Files 8 according to your java run-time version.

then I executed the bellow command :

adb backup -noapk com.MyApp.AppName

then

java -jar abe-all.jar unpack backup.ab backup.ab.tar [MyPassword]

like :

C:\adb
λ adb backup -noapk com.MyApp.AppName
Now unlock your device and confirm the backup operation.

C:\adb
λ java -jar abe-all.jar unpack backup.ab backup.ab.tar [MyPassword]
Calculated MK checksum (use UTF-8: true): C15A850070F1791D786135F7ECCC96053B63F55374EB46CEFA4C52C1B3219D44
0% 1% 2% 3% 4% 5% 6% 7% 8% 9% 10% 11% 12% 13% 14% 15% 16% 17% 18% 19% 20% 21% 22% 23% 24% 25% 26% 27% 28% 29% 30% 31% 32% 33% 34% 35% 36% 37% 38% 39% 40% 41% 42% 43% 44% 45% 46% 47% 48% 49% 50% 51% 52% 53% 54% 55% 56% 57% 58% 59% 60% 61% 62% 63% 64% 65% 66% 67% 68% 69% 70% 71% 72% 73% 74% 75% 76% 77% 78% 79% 80% 81% 82% 83% 84% 85% 86% 87% 88% 89% 90% 91% 92% 93% 94% 95% 96% 97% 98% 99% 100%
311480832 bytes written to backup.ab.tar.

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