Das inoffizielle Android-Systemhandbuch
SanDisk Ultra 512GB Microsdxc Memory Card + Adapter up to 100 MB / s, Class 10, U1, A1
SanDisk Extreme microSDXC UHS-I memory card 512 GB + adapter (for smartphones, action cameras and drones, A2, C10, V30, U3, 190 MB/s transmission, RescuePRO Deluxe)
SanDisk Extreme PRO microSDXC UHS-I Memory Card 128 GB + Adapter & RescuePRO Deluxe (for Smartphones, Action Cameras or Drones, A2, Class 10, V30, U3, 200 MB/s Transmission)
KiWiBiRD USB C SD Card Reader, Micro SD Card to USB Adapter Stick, Type C Memory Card Reader for SDXC SDHC UHS-I Cards Compatible with Mac iPad Pro MacBook Pro Galaxy S20/Tab S6, Android Mobile Phone
GiBot USB Type C Card Reader, SD/Micro SD Card Reader, Memory Card Reader with Micro USB OTG
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 - Shreddit - Data Eraser (4.4@6,598) 9 1
- Data Sanitizer (4.4@38) 3 1 LastUpdate: 2020-10-04 free space only
- 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@3,986) 5 / Secure delete Pro (4.3@226; ~EUR 2.25) Ǥ 6 1 files + folders
- Andro Shredder (3.7@1,856) 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@6,336) Ǥ 13 2 LastUpdate: 2020-10-30 free version sanitizes free space only
- Data Eraser cb (3.4@2,441) Ǥ 9 LastUpdate: 2020-10-30 demo limited to 10MB/day; unlock key required (cost unknown)
- Photo Recovery _ Data Recovery (3.3@2,222) Ǥ 9 3
- Phone Factory Reset (3.3@1,801) 2 1 LastUpdate: 2018-08-26
- Safe Delete (3@449) 5 3 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@248) 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 (3.8@198) 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 (4.4@19,133) Ǥ 14 11
- All delete file recovery app (4.4@99) 10 2
- File Recovery - Restore Files (4.1@68,537) Ǥ 9 5
- File Recovery software | Recov (4.1@3,463) 8 1 LastUpdate: 2020-12-24
- Dumpster: Photo/Video Recovery (3.8@544,017) Ǥ 21 13 a recycle bin
- Data Recovery - Restore Files (3.8@458) 6 2
- DiskDigger photo recovery (3.7@464,606) 7 1 / DiskDigger Pro file recovery (2.9@3,872; ~EUR 3.25) 7 1 Intro 7/2019
- DigDeep Image Recovery (3.7@363,501) Ǥ 15 3
- All Data Recovery - Retrieved (3.6@3,806) Ǥ 8 4
- Deleted all files recovery app (3.6@569) Ǥ 8 5
- Recycle Data Recovery Software (3.6@538) Ǥ 11 10
- Recover Deleted All Files, Photos, Videos &Contact (3.5@1,137) 11 4 LastUpdate: 2021-03-04
- File Recovery - Recover Delete (3.4@18,375) Ǥ 8 3 LastUpdate: 2021-02-19
- Recover Deleted All Files & Do (3.3@7,502) Ǥ 11 2
- Deleted Photo Recovery Worksho (3.2@77,031) Ǥ 8
- Deleted File Recovery (3.2@51,697) 7 2
- Data Recovery - Retrieve Files (3.2@6,972) Ǥ 8 4
- Undeleter Recover Files & Data (2.9@42,173) Ǥ 20 21
- Recycle Bin (2.6@17,747) Ǥ 10 2
- File Recovery - Photo & Video (1.7@14,775) Ǥ 4 1 LastUpdate: 2016-05-19
- Recover Files - Files Recycle (0@0) 8 8
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)