avtar Error <12450>: Volume path "D:\" not found -- No files from this volume wi

2020-04-29 21:40:11 avtar Error <12450>: Volume path "D:\" not found -- No files from this volume will be saved (Log #1)
2020-04-29 21:40:11 avtar Error <5244>: Unable to open directory "D:\" (code 3: The system cannot find the path specified). (Log #1)
2020-04-30 08:14:01 avtar Error <12450>: Volume path "J:\" not found -- No files from this volume will be saved (Log #1)
2020-04-30 08:14:01 avtar Error <5244>: Unable to open directory "J:\" (code 3: The system cannot find the path specified). (Log #1)

 Hello Experts,

Any suggestions?

Q1: This is Windows 2012 R2 server doing file-system backup. When I click on restore tab to check if error has any impact in real, both D & J drives were not expanding or showing any content inside. 

In another thread,

Q2: I read someone suggested to use downgrade error in datasets. I am not convinced with that suggestion. Will Downgradeerror option in Datasets will ignore the backup of D & J drive?