Try using these steps to reconnect your H drive:
1. Open File Explorer
2. On the left side you should see an icon that says This PC
3. Right click that and then select Map network drive
4. Select the appropriate letter for the drive 'H'
5. In the folder field, type this: \\admin\users
6. Select Finish
That is all you have to do. Let us know if that worked for you.
Thanks,
Tech Services