Unstable USB after downgrading to Mojave


glenster

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I am having issues with my Macbook pro 2.3 GHz Intel Core i7, 2012 model, with 16 GB 1600 MHz DDR3, NVIDIA GeForce GT 650M, running OS Mojave 10.14.6 and USB 2.0

A few days ago I downgraded from Catalina to Mojave due to hardware issues (could not run Catalina without crashing, lagging and graphics card issues) , and I am now experiencing temporary freezing on connected external USB drives. When accessing the drives it can take up to a minute to display the contents, and when viewing videos stored on the drives they randomly freeze for 30 sec to a minute before continuing playback. When saving large files I regularly experience disk freezing and disks ejecting mid transfer. Disks then remount themselves after a few minutes. These are not issues I experienced with Catalina or any previous OS, it began specifically after the downgrade.
 
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