Can you confirm for me that you still have:
Plex / Library / Application Support / Plex Media Server
(Use FileStation to do this)
If you do still have everything in the “Plex” shared folder
Then,
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Uninstall the DSM 7 Plex app – Choose the ERASE option ( radio button 3 )
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Using this procedure, Start at “Scenario 2, Step 5”
– Create a permissions rule for “PlexMediaServer” (the new name on DSM 7)
– Give FULL administrative Control to PlexMediaServer for the Plex shared folder
– APPLY it to all subfolders and files -
Wait for it to complete (it takes some time)
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Now install PMS again
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It should sit at “Installing” for an extended period – This is a good sign.
DO NOT INTERRUPT IT. -
In a new tab, open FileStation and look in the Plex shared folder
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After about 2 minutes, you’ll see
Migration.logappear. -
You can now follow the progress of the DSM 6 → DSM 7 upgrade there.
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When the “Installing” completes, everything will be done.