Das inoffizielle Android-Systemhandbuch
SanDisk Ultra 32GB microSDHC memory card + adapter up to 98 MB / s, Class 10, U1, A1, FFP
SanDisk Extreme MicroSDXC Class 10 Memory Card with SD Adaptor, Gold/Red 64GB
Verbatim, Black 64 gb
Pack of 2 Micro SD Card (A1, U3, C10,V30,4K,667X), TF Memory Card up to 100 m/s for Cameras, Dashcam, Switch and Smartphones 32 GB
GiBot USB Type C Card Reader, SD/Micro SD Card Reader, Memory Card Reader with Micro USB OTG
Sandisk Ultra 128GB MicroSDXC Class 10 Memory Card and Adaptor up to 100MB/sec, U1, A1, FFP, Grey, Red 128 GB
SanDisk Extreme microSDHC 3 Rescue Pro Deluxe Memory Card, Red/Gold 128gb
UGREEN USB C Card Reader USB 3.0 Card Reader SD Micro SD Adapter to USB-C Card Reader USB Type C Compatible with Thunderbolt 3 for MacBook Pro, iPad Pro 2018, Samsung S20/S10, A51, Huawei P30 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
- Data Eraser cb (4.9@799) Ǥ 8
demo limited to 10MB/day; unlock key required (cost unknown) - Secure Erase with iShredder 6 (4.8@3,583) Ǥ 13
/ iShredder™ 6 PRO Data Shredder (3.5@210; ~EUR 5.50) Ǥ 12 / iShredder™ 6 Enterprise Eraser (4.1@103; ~EUR 9.50) Ǥ 12 Video Review 10/2013; Intro 12/2013; Vorstellung 1/2014; free version sanitizes free space only - Shreddit - Data Eraser (4.4@3,492) 8
- Phone Factory Reset (4.4@915) 2 LastUpdate: 2018-08-26
- Data Sanitizer (4.3@30) 4 LastUpdate: 2017-02-08 free space only
- File Schredder (4.2@5) 5
- Secure Eraser (4@1,148) Ǥ 7 sanitizes free space only
- Secure delete (3.9@3,811) 5 LastUpdate: 2018-11-08 / Secure delete Pro (4.4@201; ~EUR 2.25) Ǥ 6 LastUpdate: 2018-10-01 files + folders
- Secure Bulldozer (Wipe Remove) (3.9@187) 4 LastUpdate: 2014-09-05
- Safe Delete (3.9@98) Ǥ 16 LastUpdate: 2017-09-20 safely deletes files (not wiping free space)
- Fastwipe (3.9@85) 1 LastUpdate: 2014-03-18 sanitizes free space only
- Safe Delete (3.7@176) 5 LastUpdate: 2018-04-02 safely deletes files (not wiping free space)
- FShred - Wipe Free Space (3.7@142) 2 LastUpdate: 2017-03-26 sanitizes free space
- Secure Wipe (3.6@2,328) 2 LastUpdate: 2014-06-13 sanitizes free space only
- Andro Shredder (3.6@1,651) 5 LastUpdate: 2018-03-20 files + free space
- SDelete - File Shredder (3.6@695) 4 LastUpdate: 2017-09-15 / SDelete Pro - File Shredder (3.3@11; ~EUR 2.00) 2 LastUpdate: 2017-09-17
- SHREDDER : Permanent Delete - Safe & Secure Erase (3.6@543) Ǥ 10
- Super Erase (3.5@489) Ǥ 5 files + folders; free space requires in-app payment (go pro)
- Wipe Files (3.5@14) 2
LastUpdate: 2016-02-22 Github; securely wipes files (but not free space) - Complete Wipe (3.3@108) 2 LastUpdate: 2016-06-21
- Secure File Deletion (3.3@72) 4 LastUpdate: 2013-04-29
- Permanent Delete Files – Data Eraser (3.1@833) Ǥ 7 LastUpdate: 2018-10-03
- Remo File Eraser (3.1@214) 2 LastUpdate: 2015-09-13
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.
De-Deletion (Recovering)
- Restore Deleted Photos by Dumpster (4.3@320,248) Ǥ 23 Vorstellung 7/2014; Intro 7/2014; a recycle bin
- DigDeep Image Recovery (4.3@318,534) Ǥ 12
- Recover My Files (4.2@8,977) 10 LastUpdate: 2018-06-21
- Restore Deleted Photos & Image (4.1@5,350) 4 LastUpdate: 2017-05-12
- Deleted Photo Recovery Workshop (4@64,173) Ǥ 8
- GT Recovery - Undelete,Restore (4@39,218) Ǥ 17
- Recover Deleted Pictures (4@4,337) 5 LastUpdate: 2017-12-30
- DiskDigger photo recovery (3.9@351,290) 5 / DiskDigger Pro file recovery (2.8@3,012; ~EUR 3.25) 5 Intro 7/2019
- File Recovery - Photo & Video (3.9@13,238) Ǥ 5 LastUpdate: 2016-05-19
- Recover Deleted All Files, Photos, Videos &Contact (3.9@593) 11
- RECYCLING BIN (3.9@178) 8 LastUpdate: 2017-08-11
- Data Recovery : Recover Deleted Photos (3.9@170) 10 LastUpdate: 2018-01-08
- Recover All My Deleted Files (3.8@7,430) 4 LastUpdate: 2018-03-10
- Undeleter Recover Files & Data (3.7@37,338) Ǥ 20
- Recycle Bin (3.7@17,387) Ǥ 9
- GT SMS Recovery (3.3@2,471) Ǥ 10 LastUpdate: 2016-06-30
- dr.fone - Recovery & Transfer wirelessly & Backup (2.9@29,983) Ǥ 6
Further Readings:
- Best Apps To Delete Unwanted Photos from Android Phones Parmanently (8/2018)
- Handy verkaufen? Daten richtig löschen (12/2017 - 12/2019)
- Handydaten sicher und endgültig löschen (9/2017 - 1/2018)
- Gelöschte Bilder wiederherstellen (3/2015 - 1/2019)
- Android bereinigen: So löscht Ihr überflüssige Dateien für mehr freien Speicherplatz (9/2014 - 12/2018)
- Private Daten sicher löschen – so wird’s gemacht (7/2014)
- Android zurücksetzen: So macht ihr euer Smartphone komplett platt (10/2013 - 1/2018)
- Handy-Daten sicher löschen (10/2013 - 1/2018)