Das inoffizielle Android-Systemhandbuch
256GB Micro SD Memory Cards Designed for Android Smartphones Tablets Class 10 SDXC Memory Card High Speed with Adapter (256GB)
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SanDisk Ultra 64 GB Android microSDXC Memory Card + SD Adapter up to 80 MB/s Class 10
High Speed 1024GB Micro SD Card for Android Smartphones Tablets Class 10 SDXC Memory Card with Adapter (1024GB-GH)
SanDisk Ultra 64GB (SDSQUAR-064G-GN6MA) microSDXC Memory Card + Adapter up to 100 MB / s, Class 10, U1, A1, Gray, Red
Kootion Memory Card 64GB Class 10 Micro SD Card Mini SD Card 64G MicroSDXC Card Memory Card A1 U1 UHS-I Micro SD Card Class 10 Memory SD Card MicroSD Card for Cameras Mobile Phones Tablets Android
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
- Data Eraser cb (4.8@1,712) Ǥ 9
demo limited to 10MB/day; unlock key required (cost unknown) - Secure Erase with iShredder 6 (4.5@5,026) Ǥ 13 2
free version sanitizes free space only - Phone Factory Reset (4.5@1,514) 2 1 LastUpdate: 2018-08-26
- Shreddit - Data Eraser (4.4@5,489) 9 1
- Data Sanitizer (4.4@38) 3 1 free space only
- Safe Delete (4.1@433) 5 3 LastUpdate: 2018-04-02 safely deletes files (not wiping free space)
- Secure delete (3.8@3,941) 5 / Secure delete Pro (4.3@212; ~EUR 2.25) Ǥ 6 1 files + folders
- Safe Delete (3.8@236) Ǥ 16 2 LastUpdate: 2020-02-05 safely deletes files (not wiping free space)
- Andro Shredder (3.7@1,812) 6 1 LastUpdate: 2018-03-20 files + free space
- Permanent Delete Files – Data Eraser (3.7@1,556) Ǥ 9 5
- Secure Wipe (3.6@2,525) 2 LastUpdate: 2014-06-13 sanitizes free space only
- Wipe files (3.6@15) 2
LastUpdate: 2016-02-22 Github; securely wipes files (but not free space) - SDelete - File Shredder (3.5@907) 4 1 LastUpdate: 2017-09-15 / SDelete Pro - File Shredder (3.7@13; ~EUR 2.00) 2 LastUpdate: 2017-09-17
- Complete Wipe (3.4@119) 3 LastUpdate: 2016-06-21
- Super Erase (3.3@559) Ǥ 6 3 LastUpdate: 2019-12-21 files + folders; free space requires in-app payment (go pro)
- Secure File Deletion (3.3@73) 4 1 LastUpdate: 2014-11-13
- SHREDDER : Permanent Delete - Safe & Secure Erase (3.2@734) Ǥ 11 6
- Remo File Eraser (3.2@234) 2 LastUpdate: 2015-09-13
- 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 (4.2@170) 0 LastUpdate: 2019-09-25 Github; trigger panic actions in supporting apps
De-Deletion (Recovering)
- Restore - Data Recovery Software & Recovery Media (4.8@78) Ǥ 11 6
- DigDeep Image Recovery (4.1@351,076) Ǥ 14 6
- Recovery software : Recover Deleted Files (4.1@6,381) Ǥ 9 6
- Dumpster - Recover Deleted Photos & Video Recovery (4@454,341) Ǥ 24 17 a recycle bin
- File Recovery - Photo & Video (4@14,676) Ǥ 5 1 LastUpdate: 2016-05-19
- Deleted Photo Recovery Workshop (3.9@73,288) Ǥ 8
- Data recovery: disk digger, recover deleted data (3.9@1,481) 6 3 photos only
- DiskDigger photo recovery (3.7@425,341) 7 1 / DiskDigger Pro file recovery (2.6@3,634; ~EUR 3.25) 7 1 Intro 7/2019
- Recycle Bin (3.6@17,641) Ǥ 10 2
- Recover Deleted All Files, Photos, Videos &Contact (3.5@1,137) 12 4
- Undeleter Recover Files & Data (3.3@41,025) Ǥ 20 22
- dr.fone - Recovery & Transfer wirelessly & Backup (2.7@32,862) Ǥ 6 4
Further Readings:
- 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 - 12/2019)
- Gelöschte Bilder wiederherstellen (3/2015 - 1/2019)
- Android bereinigen: So löscht Ihr überflüssige Dateien für mehr freien Speicherplatz (9/2014 - 5/2021)
- Android zurücksetzen: So macht ihr euer Smartphone komplett platt (10/2013 - 1/2018)
- Handy-Daten sicher löschen (10/2013 - 1/2018)