The need for safe, offline backup is driven by ransomware attacks, which I actually experienced in my company. However, there are also other kinds of needs to move files between workstations, home, and office computers, and there is a need to have backup in case of system crashes or accidental deletions.
\ For such situations External USB memory/disk devices are irreplaceable. I like them because I can attach them to make a backup and later detach them and physically move them to a safe place, where they are definitely offline.
\ My favorite backup method is very simple one: the usage of FreeFileSync app (high-quality freeware) that synchronizes directories. I keep all my work files on my work laptop in one root folder and sync periodically to an External USB device.
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\ \ In compliance with company rules, I keep all my External USB devices BitLocker encrypted and secured with the password needed to access the device. There are many sensitive company and personal documents I have there, so I definitely want them safe in case memory/disk device is lost, for example during commuting to/from the office.
\ Over the years technology for External USB memory/disk backup changed, bringing always greater transfer speeds. I bought some latest External SSD-s, so I wanted to test them.
2 Test scenario setupHere are the basic testing conditions:
\ Here are the specs for the ports of my laptop:
\ Here is the folder with real-life docs that I will backup:
3 Testing External 64GB USB Flash driveDevice info:
64GB USB Flash drive
Kinston DataTraveler 3.0 USB
USB-A, 3.0 (5Gbps)
49.4GB transferred in 97min 15sec
Average speed of backup 8.66MBps=69.26Mbps
Device info:
External 1 TB USB HDD
Toshiba 1 TB HDD
USB-A, 3.0 (5Gbps)
49.4GB transferred in 22min 28sec
Average speed of backup 37.5 MBps=300 Mbps
Device info:
External 1 TB SSD
Samsung PSSD T7 1TB
USB-C 3.2 Gen 2 (10Gbps)
49.4GB transferred in 4min 3sec
Average speed of backup 208 MBps=1664 Mbps
Device info:
External 2 TB SSD
Samsung PSSD T9 2TB
USB-C 3.2 Gen 2x2 (20Gbps)
49.4GB transferred in 2min 38sec
Average speed of backup 320 MBps=2560 Mbps
So, here are actual practical speeds of backup in real-world situations:
These values are measured in these conditions:
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