I bought 3 motnhs ago a WD My Passport 4TB. Got it all filled with media content. I arrived to realise these days that the speeds on it are very slow.
I remember I ran a black magic test at the begininf and it was showing roughly 80MB/s write speeds. Now it won’t go over 35’ish MB/s max write speed. More than this I noticed that on a sustained load (like download a big file) it keep around max speed and than it just drops to less than 1MB/s (and it’s not the internet connection). I replicated the same with black magic leaving it running and getting in the end the low speeds.
hdd is formatted macos ext guid. I use it on a macbook pro 2017 so really hardware support should not be an issue. os is mojave 10.14.4 (maybe is something related to beta? but i wouldn’t think so because i tested another older drive and it performed better than this one). checked it with mac os first aid and all looks fine. checked it with wd utility (roughly 12 hours) and all looks fine.
any suggestions? is that a reason to consider warranty already?
any feedback would be appreciated.
P.S. past days i did a lot of internet searches about this and I came up with nothing except that 35MB/s is slow for this drive.
LE: last resort would be to completely erase it and test again - but the problem is i have no space to dump almost 4TB of data.