[問題] mac mini 外接SSD時常會當機，畫面整個不動

最近mini外接了一台ＳＳＤ硬碟，改用ＳＳＤ硬碟開機並把很多會用到的軟體裝到這台上
雖然做事比較不卡了，但最近越來越常工作到一半就整個畫面都不動了
鍵盤按了也沒反應都要等到他自動重新開機才能繼續使用
請問這個問題有什麼解決辦法嗎？

下面是系統針對當機的報告（看有沒有大神能看出個端倪？）

Date/Time: 2018-08-23 10:42:22 +0800
OS Version: Mac OS X 10.13.6 (Build 17G65)
Architecture: x86_64h
Report Version: 26

Data Source: Stackshots

Event: progress watchdog
Duration: 0.07s
Steps: 7

Hardware model: Macmini7,1
Active cpus: 4

Time Awake Since Boot: 90000s

Process: kernel_task [0]
Path: /System/Library/Kernels/kernel
Architecture: x86_64
Version: Darwin Kernel Version 17.7.0: Thu Jun 21 22:53:14 PDT 2018; root:xnu-4570.71.2~1/RELEASE_X86_64
Task size: 11.97 GB
CPU Time: 0.006s

Thread 0x65 Thread name "VM_pageout_scan" 7 samples (1-7) priority 91 (base 91) cpu time <0.001s

*7 call_continuation + 23 (kernel + 120151) [0xffffff800021d557] 1-7
*7 vm_pageout_continue + 94 (kernel + 1143886) [0xffffff800031744e] 1-7
*7 vm_pageout_scan + 386 (kernel + 1130466) [0xffffff8000313fe2] 1-7
*7 thread_block_reason + 175 (kernel + 550463) [0xffffff800028663f] 1-7
*7 ??? (kernel + 554618) [0xffffff800028767a] 1-7
*7 machine_switch_context + 205 (kernel + 1584605) [0xffffff8000382ddd] 1-7

Thread 0x69 7 samples (1-7) priority 93 (base 93)

*7 call_continuation + 23 (kernel + 120151) [0xffffff800021d557] 1-7
*7 ??? (kernel + 656360) [0xffffff80002a03e8] 1-7
*7 stack_alloc + 247 (kernel + 588743) [0xffffff800028fbc7] 1-7
*7 kernel_memory_allocate + 359 (kernel + 989607) [0xffffff80002f19a7] 1-7
*7 vm_page_wait + 257 (kernel + 1207121) [0xffffff8000326b51] 1-7
*7 thread_block_reason + 175 (kernel + 550463) [0xffffff800028663f] 1-7
*7 ??? (kernel + 554618) [0xffffff800028767a] 1-7
*7 machine_switch_context + 205 (kernel + 1584605) [0xffffff8000382ddd] 1-7
...

================================================================
UUID: 31A3D764-2EE3-4A51-8872-3742698A5B71
Code: f27a8a2a 00000000
Stackshot reason: Watchdog

Model: Macmini7,1, BootROM MM71.0232.B00, 2 processors, Intel Core i5, 2.6 GHz, 16 GB, SMC 2.24f32
Graphics: Intel Iris, Intel Iris, Built-In
Memory Module: BANK 0/DIMM0, 8 GB, DDR3, 1600 MHz, 0x80AD, 0x483943434E4E4E434C544D4C41522D4E5444
Memory Module: BANK 1/DIMM0, 8 GB, DDR3, 1600 MHz, 0x80AD, 0x483943434E4E4E434C544D4C41522D4E5444
AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0x13B), Broadcom BCM43xx 1.0 (7.77.37.31.1a9)
Bluetooth: Version 6.0.7f10, 3 services, 27 devices, 1 incoming serial ports
Network Service: Wi-Fi, AirPort, en1
Serial ATA Device: APPLE HDD HTS541010A9E662, 1 TB
USB Device: USB 3.0 Bus
USB Device: StoreJet Transcend
USB Device: USB Optical Mouse
USB Device: IR Receiver
USB Device: BRCM20702 Hub
USB Device: Bluetooth USB Host Controller
USB Device: Keyboard Hub
USB Device: Apple Keyboard
Thunderbolt Bus: Mac mini, Apple Inc., 26.1