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How does changing the drive letter of USB attached drive fix problems?


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Guest being_doug
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I have a Seagate 4TB drive (with external power supply) attached to USB 3 port Win 10 Home. It began to have a peculiar write problem: it would write/modify non-formatted files (such as .txt, .py, .c), but not write formatted files (modifications to a pdf or a spreadsheet, for example). In all cases, I could add/move/delete/rename files. Attempting to save changes to formatted files I would get a small window in some programs saying General Input/Output Error. In other programs, the program would report that 'save failed'. I could move the file to the C drive, made whatever changes to it, move it back. So not a file corruption issue.

 

The external drive was assigned to Drive D. It is now reassigned to Drive E, and now works fine.

 

Lots of questions: Is the interface data that cause the problem stored under "Drive D" in the registry, or with the device information? Is Drive D now something that should not be assigned? What was re-written when the external USB drive was moved to Drive E?

 

I am going to leave the sleeping dog lie, but it would be helpful to have some idea where the problem was and how changing the drive letter fixed it.

 

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