I have a Maxtor One Touch 4 but the drive inside is a Seagate ST3500320AS with firmware SD35.

I was saving photos to this external drive when it disappeared from My Computer. When I go to disk management, the drive was detected but with 0 bytes. This sounds exactly like the firmware SD15 issue that Seagate is performing the free data recovery for but SD35 isn't listed as one with the problems.

Since the hard drive is bricked, I cannot back it up. I just want the data.

Will computer repair shops replace the PCB so I can get to my data?

Is this a timeconsuming effort by data recovery companies to retrieve this data?

Lynn

The PCB is not the issue. It is a problem in the actual firmware.

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You don't have to backup all of your files, just the ones you want to keep.

This assumption is incorrect
Seagate providing free DR for drives which are not detected at all. LBA size 0 usually indicates that the drive has read errors which causes translator corruption. It is not covered by free DR

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SAN, NAS, RAID, Server, and HDD Data Recovery.