As was the case with the upload file transfer tests, when testing with CrystalDiskMark the DS414slim struggles with write (upload) performance. While the DS414slim was 26% slower than the TS-435mini when measuring read performance, it was 54% slower when comparing write performance.
The DS414slim doesn’t handle the random 512K read/write test particularly well as it was less than half as quick as the TS-435mini when measuring read performance and 4x slower when measuring write performance.