TeraCopy can be used to copy files even when the source harddisk has bad sectors (confirmed)

Subject: TeraCopy can be used to copy files even when the source harddisk has bad sectors (confirmed)


Good day from Singapore,


Recently I have THREE (3) units of Western Digital WD My Passport 4 TB USB portable harddisks (model: WD40NDZW-11BCVS1) which developed bad sectors. According to Reddit and other forums (reported by ChatGPT), many many many users reported Western Digital 4 TB USB portable harddisks developed bad sectors after a short period of use or have high failure rates. According to ChatGPT, Seagate harddisks have an even higher failure rate compared to Western Digital harddisks. According to ChatGPT, internal SATA harddisks and NAS harddisks have a much higher reliability than USB portable harddisks.


ChatGPT artificial intelligence (AI) told me TeraCopy can be used to copy files even when the source harddisk has bad sectors, while Windows File Explorer will stall or hang forever when it encounters files with bad sectors. TeraCopy can be configured to skip files with bad sectors or corruption instead of hanging there forever like Windows File Explorer. Unfortunately, I didn't come across this configuration option in TeraCopy. Maybe I need to buy the Pro licensed copy of TeraCopy.


Last night on 2nd Jan 2026 Friday, I have downloaded and installed TeraCopy 3.17 from Microsoft Store on my Windows 11 home desktop computer.


At about/approximately 10.53 PM on 2nd Jan 2026 Friday, I started/initiated TeraCopy copy operation. By this time, TeraCopy was at 2.0% copying.


My objective is to copy 3.56 TB of data from one unit of Western Digital 4 TB USB portable harddisk to another unit of Western Digital 4 TB USB portable harddisk, over USB 3.0 link. USB 3.0 has a theoretical file transfer speed of 5 Gbps, as opposed to 1 Gbps for Gigabit Networking.


After waiting for 14 hours 28 minutes, TeraCopy has finally managed to copy 3.56 TB of data from one unit of Western Digital 4 TB USB portable harddisk to another unit of Western Digital 4 TB USB portable harddisk, over USB 3.0 link.


At 1.11 PM on 3rd Jan 2026 Saturday, TeraCopy copy operation has finally completed.


Yes, it took TeraCopy 14 hours 28 minutes to copy 3.56 TB of data over USB 3.0 link (5 Gbps). For Gigabit Networking of 1 Gbps, it would even be several times slower. Unless you have 2.5 Gbps or 10 Gbps Gigabit Networking.


If it was 7 TB of data, I don't know how many hours it will take. Basically you just sit there and wait for super long hours and do nothing. Just staring into blank space.


According to ChatGPT, if TeraCopy couldn't do it, Linux ddrescue will do the job. ddrescue is for Advanced sector-level recovery. FreeBSD also supports ddrescue.


Indeed, I have confirmed that TeraCopy can be used to copy files even when the source harddisk has bad sectors, without stalling or hanging there forever.


Thank you.


Regards,


Mr. Turritopsis Dohrnii Teo En Ming

Extremely Democratic People's Republic of Singapore

3rd Jan 2026 Saturday 1.23 PM Singapore Time




REFERENCES

==============


[1] https://lore.kernel.org/linux-btrfs/Lm0qJPBkTst3PlBvSRGz7Yox2TGWkpRA9fwyRYO0Y09bKBiB5A-jRdDdkJ9z4Gkf4fRhihDqTYcECvGIxIf3ftKtPArqtWxqmpFjeKT6dtw=@protonmail.com/


[2] https://marc.info/?l=linux-btrfs&m=176742069732100&w=2


[3] https://lists.freebsd.org/archives/freebsd-chat/2026-January/000061.html


[4] https://marc.info/?l=freebsd-chat&m=176742099632244&w=2


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