Backup your data while you can.
It may be that the drive is bogged down in background processes due to bad sectors.
Can you show us a SMART report in CrystalDiskInfo?
Here it is, thanks:
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CrystalDiskInfo 6.5.2 (C) 2008-2015 hiyohiyo
Crystal Dew World :
http://crystalmark.info/
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OS : Windows 8.1 Pro [6.3 Build 9600] (x64)
Date : 2019/10/31 15:17:07
-- Controller Map ----------------------------------------------------------
+ Intel(R) 100 Series/C230 Chipset Family SATA AHCI Controller [ATA]
- SanDisk SDSSDA240G
- WDC WD5000AAKX-22ERMA0
- Microsoft Storage Spaces Controller [SCSI]
+ USB Attached SCSI (UAS) Mass Storage Device [SCSI]
- Seagate BUP BL SCSI Disk Device
-- Disk List ---------------------------------------------------------------
(1) SanDisk SDSSDA240G : 240.0 GB [0/0/0, pd1] - sd
(2) WDC WD5000AAKX-22ERMA0 : 500.1 GB [1/0/0, pd1] - wd
(3) WDC WD40EMRX-82UZ0N0 : 4000.7 GB [2/0/0, sa1] - wd
(4) WDC WD40NMZW-11GX6S1 : 4000.7 GB [3/0/0, sa1] - wd
(5) ST5000LM000-2AN170 : 5000.9 GB [4/1/0, sa1] - st
(6) ST1000LM010-9YH146 : 1000.2 GB [5/0/0, sa1] - st
(7) ST1000LM024 HN-M101MBB : 1000.2 GB [6/0/0, sa1] - st
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(5) ST5000LM000-2AN170
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Model : ST5000LM000-2AN170
Firmware : 0001
Serial Number : WCJ0TFNC
Disk Size : 5000.9 GB (8.4/137.4/5000.9/5000.9)
Buffer Size : Unknown
Queue Depth : 32
# of Sectors : 9767541168
Rotation Rate : 5526 RPM
Interface : UASP (Serial ATA)
Major Version : ACS-3
Minor Version : ---- [006Dh]
Transfer Mode : SATA/600 | SATA/600
Power On Hours : 9396 hours
Power On Count : 56 count
Temperature : 36 C (96 F)
Health Status : Good
Features : S.M.A.R.T., APM, 48bit LBA, NCQ
APM Level : 8080h [ON]
AAM Level : ----
-- S.M.A.R.T. --------------------------------------------------------------
ID Cur Wor Thr RawValues(6) Attribute Name
01 _84 _64 __6 00000D5D5782 Read Error Rate
03 _96 _96 __0 000000000000 Spin-Up Time
04 100 100 _20 000000000217 Start/Stop Count
05 100 100 _10 000000000000 Reallocated Sectors Count
07 _79 _60 _45 0000051C4E99 Seek Error Rate
09 _90 _90 __0 C4D3000024B4 Power-On Hours
0A 100 100 _97 000000000000 Spin Retry Count
0C 100 100 _20 000000000038 Power Cycle Count
B7 100 100 __0 000000000000 Vendor Specific
B8 100 100 _99 000000000000 End-to-End Error
BB 100 100 __0 000000000000 Reported Uncorrectable Errors
BC 100 _98 __0 002000210028 Command Timeout
BD 100 100 __0 000000000000 High Fly Writes
BE _64 _43 _40 000034230024 Airflow Temperature
BF 100 100 __0 000000000009 G-Sense Error Rate
C0 100 100 __0 000000000010 Power-off Retract Count
C1 _82 _82 __0 000000009148 Load/Unload Cycle Count
C2 _36 _57 __0 001400000024 Temperature
C3 _84 _64 __0 00000D5D5782 Hardware ECC recovered
C5 100 100 __0 000000000000 Current Pending Sector Count
C6 100 100 __0 000000000000 Uncorrectable Sector Count
C7 200 200 __0 000000000000 UltraDMA CRC Error Count
F0 100 253 __0 33860000035F Head Flying Hours
F1 100 253 __0 0005DFF3C669 Total Host Writes
F2 100 253 __0 0005346F60FF Total Host Reads
FE 100 100 __0 000000000000 Free Fall Protection
-- IDENTIFY_DEVICE ---------------------------------------------------------
0 1 2 3 4 5 6 7 8 9
000: 0C5A 3FFF C837 0010 0000 0000 003F 0000 0000 0000
010: 2020 2020 2020 2020 2020 2020 5743 4A30 5446 4E43
020: 0000 0000 0000 3030 3031 2020 2020 5354 3530 3030
030: 4C4D 3030 302D 3241 4E31 3730 2020 2020 2020 2020
040: 2020 2020 2020 2020 2020 2020 2020 8010 4000 2F00
050: 4000 0200 0200 0007 3FFF 0010 003F FC10 00FB 0C10
060: FFFF 0FFF 0000 0407 0003 0078 0078 0078 0078 0000
070: 0000 0000 0000 0000 0000 001F 850E 0006 00CC 0000
080: 07F0 006D 346B 7D69 4163 3469 BC49 4163 007F 819C
090: 819C 8080 FFFE 0000 D0D0 0000 0000 0000 0000 0000
100: D9B0 4630 0002 0000 0000 0000 6003 0000 5000 C500
110: BA73 F86F 0000 0000 0000 0000 0000 0000 0000 405C
120: 401C 0000 0000 0000 0000 0000 0000 0000 0021 D9B0
130: 4630 D9B0 4630 2020 0002 0140 0100 5000 3C06 3C0A
140: 0000 003C 0000 0008 0000 0000 BDFF 0280 0000 0000
150: 0008 0000 0000 0807 0000 8002 0000 0100 A100 8000
160: 0000 0000 0000 0000 0000 0000 0000 0000 0003 0000
170: 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000
180: 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000
190: 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000
200: 0000 0000 0000 0000 0000 0000 30A5 0000 0000 4000
210: 0000 0000 0000 0000 0000 0000 0000 1596 0000 0000
220: 0000 0000 107F 0000 0000 0000 0000 0000 0000 0000
230: 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000
240: 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000
250: 0000 0000 0000 0000 0000 DEA5
-- SMART_READ_DATA ---------------------------------------------------------
+0 +1 +2 +3 +4 +5 +6 +7 +8 +9 +A +B +C +D +E +F
000: 0A 00 01 0F 00 54 40 82 57 5D 0D 00 00 00 03 03
010: 00 60 60 00 00 00 00 00 00 00 04 32 00 64 64 17
020: 02 00 00 00 00 00 05 33 00 64 64 00 00 00 00 00
030: 00 00 07 0F 00 4F 3C 99 4E 1C 05 00 00 00 09 32
040: 00 5A 5A B4 24 00 00 D3 C4 25 0A 13 00 64 64 00
050: 00 00 00 00 00 00 0C 32 00 64 64 38 00 00 00 00
060: 00 00 B7 32 00 64 64 00 00 00 00 00 00 00 B8 32
070: 00 64 64 00 00 00 00 00 00 00 BB 32 00 64 64 00
080: 00 00 00 00 00 00 BC 32 00 64 62 28 00 21 00 20
090: 00 00 BD 3A 00 64 64 00 00 00 00 00 00 00 BE 22
0A0: 00 40 2B 24 00 23 34 00 00 00 BF 32 00 64 64 09
0B0: 00 00 00 00 00 00 C0 32 00 64 64 10 00 00 00 00
0C0: 00 00 C1 32 00 52 52 48 91 00 00 00 00 00 C2 22
0D0: 00 24 39 24 00 00 00 14 00 00 C3 1A 00 54 40 82
0E0: 57 5D 0D 00 00 00 C5 12 00 64 64 00 00 00 00 00
0F0: 00 00 C6 10 00 64 64 00 00 00 00 00 00 00 C7 3E
100: 00 C8 C8 00 00 00 00 00 00 00 F0 00 00 64 FD 5F
110: 03 00 00 86 33 23 F1 00 00 64 FD 69 C6 F3 DF 05
120: 00 00 F2 00 00 64 FD FF 60 6F 34 05 00 00 FE 32
130: 00 64 64 00 00 00 00 00 00 00 00 00 00 00 00 00
140: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
150: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
160: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 73
170: 03 00 01 00 01 FF 02 36 03 00 00 00 00 00 00 00
180: 00 00 00 00 0B 00 00 00 04 03 04 04 04 05 04 04
190: 04 00 00 00 00 00 00 00 00 01 00 00 00 00 00 00
1A0: 00 00 00 00 09 00 00 00 16 B5 EE 7D C4 1E 00 00
1B0: 00 00 00 00 01 00 31 00 69 C6 F3 DF 05 00 00 00
1C0: FF 60 6F 34 05 00 00 00 00 00 00 00 00 00 00 00
1D0: 01 00 00 00 00 00 00 00 7F 0C 00 00 05 00 00 00
1E0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 03 14
1F0: 01 00 00 00 00 00 00 00 00 00 03 1A 00 00 00 ED
-- SMART_READ_THRESHOLD ----------------------------------------------------
+0 +1 +2 +3 +4 +5 +6 +7 +8 +9 +A +B +C +D +E +F
000: 01 00 01 06 00 00 00 00 00 00 00 00 00 00 03 00
010: 00 00 00 00 00 00 00 00 00 00 04 14 00 00 00 00
020: 00 00 00 00 00 00 05 0A 00 00 00 00 00 00 00 00
030: 00 00 07 2D 00 00 00 00 00 00 00 00 00 00 09 00
040: 00 00 00 00 00 00 00 00 00 00 0A 61 00 00 00 00
050: 00 00 00 00 00 00 0C 14 00 00 00 00 00 00 00 00
060: 00 00 B7 00 00 00 00 00 00 00 00 00 00 00 B8 63
070: 00 00 00 00 00 00 00 00 00 00 BB 00 00 00 00 00
080: 00 00 00 00 00 00 BC 00 00 00 00 00 00 00 00 00
090: 00 00 BD 00 00 00 00 00 00 00 00 00 00 00 BE 28
0A0: 00 00 00 00 00 00 00 00 00 00 BF 00 00 00 00 00
0B0: 00 00 00 00 00 00 C0 00 00 00 00 00 00 00 00 00
0C0: 00 00 C1 00 00 00 00 00 00 00 00 00 00 00 C2 00
0D0: 00 00 00 00 00 00 00 00 00 00 C3 00 00 00 00 00
0E0: 00 00 00 00 00 00 C5 00 00 00 00 00 00 00 00 00
0F0: 00 00 C6 00 00 00 00 00 00 00 00 00 00 00 C7 00
100: 00 00 00 00 00 00 00 00 00 00 F0 00 00 00 00 00
110: 00 00 00 00 00 00 F1 00 00 00 00 00 00 00 00 00
120: 00 00 F2 00 00 00 00 00 00 00 00 00 00 00 FE 00
130: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
140: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
150: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
160: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
170: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
190: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
1A0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
1B0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
1C0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
1D0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
1E0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
1F0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 32