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 h=
as 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. A=
ccording to Reddit and other forums (reported by ChatGPT), many many many u=
sers reported Western Digital 4 TB USB portable harddisks developed bad sec=
tors after a short period of use or have high failure rates. According to C=
hatGPT, Seagate harddisks have an even higher failure rate compared to West=
ern Digital harddisks. According to ChatGPT, internal SATA harddisks and NA=
S harddisks have a much higher reliability than USB portable harddisks.

ChatGPT artificial intelligence (AI) told me TeraCopy can be used to copy f=
iles even when the source harddisk has bad sectors, while Windows File Expl=
orer will stall or hang forever when it encounters files with bad sectors. =
TeraCopy can be configured to skip files with bad sectors or corruption ins=
tead of hanging there forever like Windows File Explorer. Unfortunately, I =
didn't come across this configuration option in TeraCopy. Maybe I need to b=
uy 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 portab=
le harddisk, over USB 3.0 link. USB 3.0 has a theoretical file transfer spe=
ed 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 harddis=
k 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 co=
mpleted.

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 sever=
al 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 star=
ing into blank space.

According to ChatGPT, if TeraCopy couldn't do it, Linux ddrescue will do th=
e job. ddrescue is for Advanced sector-level recovery. FreeBSD also support=
s 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 fore=
ver.

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