@Eitrudy 

Thanks for reaching out to us. 

Actually, Archer VR600 support hard disk up to 5TB storage  But there is an issue that if the storage of single partition in the hard disk is 5TB, it must be divided to smaller partitions, otherwise it can't be recognized.

  @PasKy 

I think you are right, and the reply earlier is kind of confusing.

Archer VR600 supports both GPT and MBR partition tables.

And the total storage of HDD with multiple partitions is 5TB. But each partition needs to be less than 5TB.

For VR900, the total storage of HDD is also 5TB but a signal partition could be 5TB.

For most of the USB storage cases I have ever received, the final reason that caused the unrecognized problem seems to be the file numbers.

The limitation on the number of files on the Media Server function needs to be within 10,000 files.

I am still trying to learn more about USB sharing staff and would be happy to receive any comments.

Thank you very much.