Das inoffizielle Android-Systemhandbuch
SanDisk Ultra Android microSDXC UHS-I memory card 256 GB + adapter (for smartphones and tablets, A1, Class 10, U1, full HD videos, up to 150 MB/s read speed)
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KOOTION Micro SD Card 32GB Class 10 Pack of 5 Memory Cards SD MicroSDHC Mini SD Card 32G Memory Cards Colourful (UHS-I A1 U1) SD Card Bundle MicroSD Card for Cameras Mobile Phone Tablet Android
Kootion Micro SD Card 32GB Memory Card MicroSDHC Class 10 Mini SD Card UHS-I U1 A1 Memory Cards Pack of 2 Memory SD Cards 32G Pack of 2 Micro SD Card Memory Card for Cameras Mobile Phone Android Tablet
Kootion 128GB SD Card Class 10 Micro SD Card 128G Memory Card MicroSDXC Card Mini SD Card Class 10 (A1 UHS-I U1) Memory SD Card for Cameras Mobile Phones Tablets Android Smartphones
Safe Data-Wipe
The day will come: your good-old Android shall get replaced by a newer model. If you no longer need the "old one", you probably want to give it away. But you certainly don't want the new owner accessing your sensible data which might have been stored on it. So what to do?
There's of course the Factory-Reset. But does it really sanitize your data in a way they cannot be (easily) restored? Unfortunately, that's not the case: though they are deleted, they are not wiped – so with the right tools, they could be restored. Admitted, that takes some little knowledge and work – but it's possible. A good counter-measure is to really "nuke" or "wipe" the storage – i.e. overwrite it with "random patterns". Corresponding guidelines are described by the National Institute of Standards and Technology (NIST) in a PDF Dokument.
Secure Wipe
- Complete Wipe (5@120) 3
LastUpdate: 2016-06-21 - Data Sanitizer (4.4@38) 3 1
LastUpdate: 2020-10-04 free space only - Shreddit - Data Eraser (4.2@6,926) Ǥ 9 1
- SDelete - File Shredder (4.1@962) 3 1 LastUpdate: 2017-09-15 / SDelete Pro - File Shredder (5@13; ~EUR 2.00) 2 LastUpdate: 2017-09-17
- Secure delete (3.9@3,990) 5 / Secure delete Pro (4.4@227; ~EUR 2.25) Ǥ 6 1 files + folders
- Andro Shredder (3.7@1,868) 6 1 LastUpdate: 2018-03-20 files + free space
- Wipe files (3.6@15) 2
LastUpdate: 2016-02-22 Github; securely wipes files (but not free space) - Secure Erase iShredder (3.4@7,311) Ǥ 13 free version sanitizes free space only
- Data Eraser cb (3.4@2,824) Ǥ 9 LastUpdate: 2020-10-30 demo limited to 10MB/day; unlock key required (cost unknown)
- Phone Factory Reset (3.3@1,915) 2 1 LastUpdate: 2018-08-26
- Photo Recovery - Data Recovery (3.1@2,543) Ǥ 12 6
- Safe Delete (3@449) 5 3 LastUpdate: 2021-07-13 safely deletes files (not wiping free space)
- Safe Delete (3@241) Ǥ 16 2 LastUpdate: 2020-02-05 safely deletes files (not wiping free space)
- Secure Wipe (2.7@2,542) 1 LastUpdate: 2014-06-13 sanitizes free space only
- Remo File Eraser (2.6@249) 2 LastUpdate: 2015-09-13
- Secure File Deletion (2@73) 4 1 LastUpdate: 2014-11-13
- Extirpater (0@0) 0
GitLab
Automated Deletion
Not quite a safe wipe as described above – but still a welcome helper: automatically do a factory-reset / delete all files, if the number of unsuccessful unlock-trials exceeds a certain threshold. That at least makes it more difficult for the attacker to access your data. Unfortunately, none of the few apps in this group is available anymore.
- Ripple: respond when panicking (4@207) 0 LastUpdate: 2019-09-25 Github; trigger panic actions in supporting apps
- Wasted (0@0) 4 Github; wipes device when receiving broadcast message with authentication code
De-Deletion (Recovering)
- Dumpster Recovery Deleted File (4.5@22,422) Ǥ 16 11
- All delete file recovery app (4.4@101) 10 2
- File Recovery - Restore Files (4.1@81,228) Ǥ 10 8
- File Recovery software | Recov (4.1@3,545) 8 1 LastUpdate: 2020-12-24
- Dumpster: Photo/Video Recovery (3.9@568,038) Ǥ 17 11 a recycle bin
- Deleted all files recovery app (3.8@668) Ǥ 8 5
- Files Recovery Photos Recovery (3.8@477) Ǥ 7 2
- DiskDigger photo recovery (3.7@474,537) 7 1 / DiskDigger Pro file recovery (2.9@3,927; ~EUR 3.25) 7 1 Intro 7/2019
- DigDeep Image Recovery (3.7@365,556) Ǥ 15 4
- All Data Recovery - Restorer (3.7@3,774) Ǥ 8 4
- Recover Deleted All Files, Photos, Videos &Contact (3.5@1,137) 11 4 LastUpdate: 2021-03-04
- File Recovery - Recover Delete (3.4@18,822) Ǥ 8 3 LastUpdate: 2021-02-19
- Deleted Photo Recovery Worksho (3.2@77,856) Ǥ 8
- Deleted File Recovery (3.2@52,681) 7 2
- Recover Deleted All Files & Do (3.2@7,803) Ǥ 11 2
- Restore Data Recovery Software (3.1@562) Ǥ 11 10
- Undeleter Recover Files & Data (2.9@42,354) Ǥ 20 21
- Recycle Bin (2.6@17,754) Ǥ 12 2
- File Recovery - Photo & Video (1.7@14,775) Ǥ 4 1 LastUpdate: 2016-05-19
- Recover Files - Files Recycle (0@0) Ǥ 8 10
Further Readings:
- 5 Best Ways to Permanently Delete Android Data (7/2022)
- 5 Android Apps That Recover Deleted Files for You (5/2021)
- Best Apps To Delete Unwanted Photos from Android Phones Parmanently (8/2018)
- Handy verkaufen? Daten richtig löschen (12/2017 - 5/2022)
- Gelöschte Bilder wiederherstellen (3/2015 - 1/2019)
- Handy-Speicher voll? So könnt Ihr Euer Smartphone aufräumen (9/2014 - 4/2022)
- Android zurücksetzen: So macht ihr euer Smartphone komplett platt (10/2013 - 1/2018)
- Handy-Daten sicher löschen (10/2013 - 1/2018)