Файлы внезапно исчезают (и снова появляются) на USB-накопителе NTFS, используемом в Linux?

Недавно я купил портативный внешний USB-накопитель емкостью 1 ТБ, который я собираюсь использовать в основном с ноутбуком Ubuntu, но я бы хотел использовать его и с другими ОС. Он был создан как NTFS, и это, кажется, лучший вариант из того, что я прочитал.

С ним были и другие проблемы, но что меня действительно беспокоит, так это то, что большая папка с данными внезапно исчезает без следа, а затем снова появляется так же внезапно, когда я уже использовал накопитель несколько раз в течение нескольких дней.

Почему это могло произойти и как я могу предотвратить это снова?

Вот результаты, которые я получил от бега sudo smartctl -d sat --all /dev/sdc.

=== START OF INFORMATION SECTION === Model Family: Seagate Momentus SpinPoint M8 (AF) Device Model: ST1000LM024 HN-M101MBB Serial Number: S30CJ9HF237802 LU WWN Device Id: 5 0004cf 20c8d5561 Firmware Version: 2BA30001 User Capacity: 1,000,204,886,016 bytes [1.00 TB] Sector Sizes: 512 bytes logical, 4096 bytes physical Rotation Rate: 5400 rpm Device is: In smartctl database [for details use: -P show] ATA Version is: ATA8-ACS T13/1699-D revision 6 SATA Version is: SATA 3.0, 6.0 Gb/s (current: 3.0 Gb/s) Local Time is: Wed Aug 6 15:29:48 2014 EDT SMART support is: Available - device has SMART capability. SMART support is: Enabled  === START OF READ SMART DATA SECTION === SMART overall-health self-assessment test result: PASSED Warning: This result is based on an Attribute check.  General SMART Values: Offline data collection status: (0x00) Offline data collection activity was never started. Auto Offline Data Collection: Disabled. Self-test execution status: ( 0) The previous self-test routine completed without error or no self-test has ever  been run. Total time to complete Offline  data collection: (12660) seconds. Offline data collection capabilities: (0x5b) SMART execute Offline immediate. Auto Offline data collection on/off support. Suspend Offline collection upon new command. Offline surface scan supported. Self-test supported. No Conveyance Self-test supported. Selective Self-test supported. SMART capabilities: (0x0003) Saves SMART data before entering power-saving mode. Supports SMART auto save timer. Error logging capability: (0x01) Error logging supported. General Purpose Logging supported. Short self-test routine  recommended polling time: ( 2) minutes. Extended self-test routine recommended polling time: ( 211) minutes. SCT capabilities: (0x003f) SCT Status supported. SCT Error Recovery Control supported. SCT Feature Control supported. SCT Data Table supported.  SMART Attributes Data Structure revision number: 16 Vendor Specific SMART Attributes with Thresholds: ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED WHEN_FAILED RAW_VALUE 1 Raw_Read_Error_Rate 0x002f 100 100 051 Pre-fail Always - 0 2 Throughput_Performance 0x0026 252 252 000 Old_age Always - 0 3 Spin_Up_Time 0x0023 090 090 025 Pre-fail Always - 3115 4 Start_Stop_Count 0x0032 100 100 000 Old_age Always - 44 5 Reallocated_Sector_Ct 0x0033 252 252 010 Pre-fail Always - 0 7 Seek_Error_Rate 0x002e 252 252 051 Old_age Always - 0 8 Seek_Time_Performance 0x0024 252 252 015 Old_age Offline - 0 9 Power_On_Hours 0x0032 100 100 000 Old_age Always - 39 10 Spin_Retry_Count 0x0032 252 252 051 Old_age Always - 0 11 Calibration_Retry_Count 0x0032 100 100 000 Old_age Always - 1 12 Power_Cycle_Count 0x0032 100 100 000 Old_age Always - 36 191 G-Sense_Error_Rate 0x0022 252 252 000 Old_age Always - 0 192 Power-Off_Retract_Count 0x0022 252 252 000 Old_age Always - 0 194 Temperature_Celsius 0x0002 064 053 000 Old_age Always - 31 (Min/Max 19/47) 195 Hardware_ECC_Recovered 0x003a 100 100 000 Old_age Always - 0 196 Reallocated_Event_Count 0x0032 252 252 000 Old_age Always - 0 197 Current_Pending_Sector 0x0032 252 252 000 Old_age Always - 0 198 Offline_Uncorrectable 0x0030 252 252 000 Old_age Offline - 0 199 UDMA_CRC_Error_Count 0x0036 200 200 000 Old_age Always - 0 200 Multi_Zone_Error_Rate 0x002a 100 100 000 Old_age Always - 13 223 Load_Retry_Count 0x0032 100 100 000 Old_age Always - 1 225 Load_Cycle_Count 0x0032 100 100 000 Old_age Always - 719  SMART Error Log Version: 1 No Errors Logged  SMART Self-test log structure revision number 1 No self-tests have been logged. [To run self-tests, use: smartctl -t]   SMART Selective self-test log data structure revision number 0 Note: revision number not 1 implies that no selective self-test has ever been run SPAN MIN_LBA MAX_LBA CURRENT_TEST_STATUS 1 0 0 Completed [00% left] (0-65535) 2 0 0 Not_testing 3 0 0 Not_testing 4 0 0 Not_testing 5 0 0 Not_testing Selective self-test flags (0x0): After scanning selected spans, do NOT read-scan remainder of disk. If Selective self-test is pending on power-up, resume after 0 minute delay.