Das inoffizielle Android-System-Handbuch (Professional Series)
SanDisk Ultra Android microSDXC UHS-I Memory Card 256GB + Adapter (for Smartphones and Tablets, A1, Class 10, U1, Full HD Videos, Up to 150MB/s Read Speed)
dolrun SD Card 512 GB - Mini SD Card 512 GB Memory Card SD Card External Data Storage Memory Card for Laptops, Android Mobile Phones, Cameras
SanDisk Extreme microSDXC UHS-I Memory Card 64 GB + Adapter (for Smartphones, Action Cameras and Drones, A2, C10, V30, U3, 170 MB/s Transmission, RescuePRO Deluxe)
Samsung PRO Plus 256GB MicroSD Card + SD Adapter for Mobile Gaming on Smartphones, Tablets and Handheld Consoles, UHS-I U3, Full HD & 4K UHD, 180MB/s Read, 130MB/s Write, MB-MD256SA/EU
Beikell SD Card Reader, Dual Plug USB 3.0/USB C Card Reader High Speed OTG Adapter, for SD/MMC/Micro SD/TF/SDXC/SDHC/Micro SDHC/Micro SDXC, Compatible with Android/Windows/Mac OS etc.
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 - Secure Erase iShredder (4.4@8,292) Ǥ 14 free version sanitizes free space only
- Data Sanitizer (4.4@38) 3 2
LastUpdate: 2020-10-04 free space only - Shreddit - Data Eraser (4.2@7,973) Ǥ 13 1
- SDelete - File Shredder (4.1@982) 5 1 / SDelete Pro - File Shredder (5@13; ~EUR 2.75) 2
- Secure delete (3.9@3,979) 4 LastUpdate: 2022-03-08 files + folders
- Andro Shredder (3.7@1,863) 5 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) - Data Eraser App - Wipe Data (3.3@2,793) Ǥ 12 demo limited to 10MB/day; unlock key required (cost unknown)
- Phone Factory Reset (3.2@1,979) 2 1 LastUpdate: 2018-08-26
- 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)
- Photo Recovery - Data Recovery (2.9@2,609) Ǥ 11 4
- Secure Wipe (2.7@2,542) 1 LastUpdate: 2014-06-13 sanitizes free space only
- Remo File Eraser (2@249) 2 LastUpdate: 2015-09-13
- Secure File Deletion (2@73) 3 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.
- Wasted (4.2@42) 4 LastUpdate: 2022-09-02 Github; wipes device when receiving broadcast message with authentication code
- Ripple: respond when panicking (4@210) 0 LastUpdate: 2019-09-25 Github; trigger panic actions in supporting apps
De-Deletion (Recovering)
- Recover Deleted Files App (4.5@18,674) Ǥ 25 14
- File Recovery software | Recov (4.2@3,553) 8 1 LastUpdate: 2020-12-24
- Undeleter Recover Files & Data (4.2@12) Ǥ 20 21 LastUpdate: 2022-03-03
- Dumpster: Photo/Video Recovery (4.1@661,405) Ǥ 17 10 a recycle bin
- DigDeep Image Recovery (3.7@365,007) Ǥ 15 7
- All Data Recovery - Restorer (3.7@3,492) Ǥ 8 4 LastUpdate: 2022-07-26
- DiskDigger photo recovery (3.5@505,590) 6 1 / DiskDigger Pro file recovery (2.9@4,113; ~EUR 3.25) 6 1 Intro 7/2019
- Recover Deleted All Files, Photos, Videos &Contact (3.5@1,137) 11 4 LastUpdate: 2021-03-04
- Deleted File Recovery (3.4@53,782) 7 2
- File Recovery - Recover Deleted Files (3.4@19,483) 7 3 LastUpdate: 2021-02-19
- RestoreMate File Recovery (3.3@11,024) Ǥ 17 19
- Photos & Videos Recovery App (3.3@716) Ǥ 7 2
- File Recover : Photo Recovery (3.1@8,249) Ǥ 12 4
- Recycle Bin (2.3@17,592) Ǥ 18 6
- File Recovery - Photo & Video (1.7@14,775) Ǥ 4 1 LastUpdate: 2016-05-19
- Data Recovery Software (1.5@401) Ǥ 11 10
Further Readings:
- 5 Best Ways to Permanently Delete Android Data (7/2022 - 7/2023)
- 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 - 7/2023)
- Handy-Daten sicher löschen (10/2013 - 1/2018)