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I am trying to set up Plex. I bought a new External drive at 5TBs. All my movies are stored on a Samsung 960 evo m.2 nvme drive on my computer. And When transferring to the new external drive via USB 3.1 cable. The speed maxes out at around 120 megabytes a second. Do anyone know why my speeds are so slow?
 

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I am trying to set up Plex. I bought a new External drive at 5TBs. All my movies are stored on a Samsung 960 evo m.2 nvme drive on my computer. And When transferring to the new external drive via USB 3.1 cable. The speed maxes out at around 120 megabytes a second. Do anyone know why my speeds are so slow?
That's about right for USB external HDD.
 
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Thanks. I saw some videos of people moving files at 500MBS per second and thought maybe something is wrong with my rig.
There are a lot of factors. A USB 3 dongle on an external SSD can probably get close to some of those speeds. But if you have a bigger drive that's mechanical, around 120mb/sec is about right. Also many USB dongles are USB 2 and its also possible you're plugged into a USB 2 port. Other devices on the USB bus can impact it as well. In general, I see no red flags at 120mb/sec for USB transfers.
 

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500MB read or write speed will be SSD, not possible with mechanical drives. The physical drives I have from the external drives are capable of maxinum around 150 to 190 MB/s sustained trasfer rate (8T and 14T drives) suing SATA. When I put them up in software RAID0, they get around 220 to 250 MB/s max.

Actually, I found out most cheap SSDs can't even sustain over 200MB/s write when you trasfer large 4K files because these SSDs have a rather small SLC cache. Once the cache filled up, the write speed drops significantly, to around or below 200MB/s.
 

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No, a mechanical drive will only get you anywhere from 120-150MB/sec from the media.

To get 500MB/sec requires an SSD. But not an SSD in a SATA case - you will need one of the fancy SSDs in the thin cases which mean it has an NVMe SSD inside it. I've had one hooked to a USB3 port and yes, I got those speeds. But I also paid nearly $250 for a 1TB drive.
 
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