I have an EX4 with (4) 4tb drives configured as raid 5. The newest replacement drive is a WD Red Plus which formatted fine and came online as it should and became part of the raid configuration. When I was browsing the other day, the information screen states 28.0 tbs free. there is only 16tb in the unit .
Any and all help is greatly appreciated, I have also noticed the power led is solid red, but all drives are blue .
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After reformatting the drives and resetting up shares and users it appears to have corrected the issue with the solid red power light. I am still concerned the LED reads 11.8t free space after I have restored almost 1tb. Windows shows the correct free space but the ex4 does not.