Property, Plant and Equipment Disclosure
Asset Age Ratios (Summary)
Average Age
Estimated Total Useful Life
Estimated Age, Time Elapsed Since Purchase
Estimated Remaining Life

Western Digital Corp., balance sheet: property, plant and equipment

US$ in millions

	Jun 30, 2023	Jul 1, 2022	Jul 2, 2021	Jul 3, 2020	Jun 28, 2019	Jun 29, 2018
Land	269)	269)	278)	294)	294)	306)
Buildings and improvements	1,955)	1,920)	1,854)	1,837)	1,743)	1,949)
Machinery and equipment	8,704)	8,642)	7,860)	7,391)	7,267)	7,209)
Computer equipment and software	470)	494)	440)	429)	441)	440)
Furniture and fixtures	54)	54)	51)	52)	56)	48)
Construction-in-process	798)	591)	476)	297)	202)	234)
Property, plant and equipment, gross	12,250)	11,970)	10,959)	10,300)	10,003)	10,186)
Accumulated depreciation	(8,630)	(8,300)	(7,771)	(7,446)	(7,160)	(7,091)
Property, plant and equipment, net	3,620)	3,670)	3,188)	2,854)	2,843)	3,095)

Based on: 10-K (reporting date: 2023-06-30), 10-K (reporting date: 2022-07-01), 10-K (reporting date: 2021-07-02), 10-K (reporting date: 2020-07-03), 10-K (reporting date: 2019-06-28), 10-K (reporting date: 2018-06-29).

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Item	Description	The company
Property, plant and equipment, gross	Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.	Western Digital Corp. property, plant and equipment, gross increased from 2021 to 2022 and from 2022 to 2023.
Property, plant and equipment, net	Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.	Western Digital Corp. property, plant and equipment, net increased from 2021 to 2022 but then slightly decreased from 2022 to 2023.

Western Digital Corp., asset age ratios

	Jun 30, 2023	Jul 1, 2022	Jul 2, 2021	Jul 3, 2020	Jun 28, 2019	Jun 29, 2018
Average age ratio	72.03%	70.93%	72.76%	74.42%	73.75%	71.77%
Estimated total useful life (years)	17	17	15	13	12	11
Estimated age, time elapsed since purchase (years)	12	12	11	9	8	8
Estimated remaining life (years)	5	5	4	3	3	3

Based on: 10-K (reporting date: 2023-06-30), 10-K (reporting date: 2022-07-01), 10-K (reporting date: 2021-07-02), 10-K (reporting date: 2020-07-03), 10-K (reporting date: 2019-06-28), 10-K (reporting date: 2018-06-29).

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Asset age ratio	Description	The company
Average age ratio	As long as straight-line depreciation is used, this is an accurate estimate of asset age as a percentage of depreciable life. The relative age is a useful measure of whether the company fixed asset base is old or new. Newer assets are likely to be more efficient.	Western Digital Corp. average age ratio of depreciable property, plant and equipment improved from 2021 to 2022 but then slightly deteriorated from 2022 to 2023 not reaching 2021 level.
Estimated total useful life	Over longer time periods, this ratio is a useful measure of company depreciation policy and can be used for comparisons with competitors.	Western Digital Corp. estimated total useful life of depreciable property, plant and equipment increased from 2021 to 2022 and from 2022 to 2023.
Estimated time elapsed since purchase	The approximate age in years of a company fixed assets. Useful for comparison purposes.	Western Digital Corp. estimated time elapsed since purchase of depreciable property, plant and equipment deteriorated from 2021 to 2022 and from 2022 to 2023.
Estimated remaining life		Western Digital Corp. estimated remaining life of depreciable property, plant and equipment increased from 2021 to 2022 and from 2022 to 2023.

	Jun 30, 2023	Jul 1, 2022	Jul 2, 2021	Jul 3, 2020	Jun 28, 2019	Jun 29, 2018
Selected Financial Data (US$ in millions)
Accumulated depreciation	8,630)	8,300)	7,771)	7,446)	7,160)	7,091)
Property, plant and equipment, gross	12,250)	11,970)	10,959)	10,300)	10,003)	10,186)
Land	269)	269)	278)	294)	294)	306)
Asset Age Ratio
Average age¹	72.03%	70.93%	72.76%	74.42%	73.75%	71.77%

Based on: 10-K (reporting date: 2023-06-30), 10-K (reporting date: 2022-07-01), 10-K (reporting date: 2021-07-02), 10-K (reporting date: 2020-07-03), 10-K (reporting date: 2019-06-28), 10-K (reporting date: 2018-06-29).

2023 Calculations

¹ Average age = 100 × Accumulated depreciation ÷ (Property, plant and equipment, gross – Land)
= 100 × 8,630 ÷ (12,250 – 269) = 72.03%

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Asset age ratio	Description	The company
Average age	As long as straight-line depreciation is used, this is an accurate estimate of asset age as a percentage of depreciable life. The relative age is a useful measure of whether the company fixed asset base is old or new. Newer assets are likely to be more efficient.	Western Digital Corp. average age ratio of depreciable property, plant and equipment improved from 2021 to 2022 but then slightly deteriorated from 2022 to 2023 not reaching 2021 level.

	Jun 30, 2023	Jul 1, 2022	Jul 2, 2021	Jul 3, 2020	Jun 28, 2019	Jun 29, 2018
Selected Financial Data (US$ in millions)
Property, plant and equipment, gross	12,250)	11,970)	10,959)	10,300)	10,003)	10,186)
Land	269)	269)	278)	294)	294)	306)
Depreciation expense for property, plant and equipment	695)	708)	726)	797)	844)	871)
Asset Age Ratio (Years)
Estimated total useful life¹	17	17	15	13	12	11

Based on: 10-K (reporting date: 2023-06-30), 10-K (reporting date: 2022-07-01), 10-K (reporting date: 2021-07-02), 10-K (reporting date: 2020-07-03), 10-K (reporting date: 2019-06-28), 10-K (reporting date: 2018-06-29).

2023 Calculations

¹ Estimated total useful life = (Property, plant and equipment, gross – Land) ÷ Depreciation expense for property, plant and equipment
= (12,250 – 269) ÷ 695 = 17

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Asset age ratio	Description	The company
Estimated total useful life	Over longer time periods, this ratio is a useful measure of company depreciation policy and can be used for comparisons with competitors.	Western Digital Corp. estimated total useful life of depreciable property, plant and equipment increased from 2021 to 2022 and from 2022 to 2023.

	Jun 30, 2023	Jul 1, 2022	Jul 2, 2021	Jul 3, 2020	Jun 28, 2019	Jun 29, 2018
Selected Financial Data (US$ in millions)
Accumulated depreciation	8,630)	8,300)	7,771)	7,446)	7,160)	7,091)
Depreciation expense for property, plant and equipment	695)	708)	726)	797)	844)	871)
Asset Age Ratio (Years)
Time elapsed since purchase¹	12	12	11	9	8	8

Based on: 10-K (reporting date: 2023-06-30), 10-K (reporting date: 2022-07-01), 10-K (reporting date: 2021-07-02), 10-K (reporting date: 2020-07-03), 10-K (reporting date: 2019-06-28), 10-K (reporting date: 2018-06-29).

2023 Calculations

¹ Time elapsed since purchase = Accumulated depreciation ÷ Depreciation expense for property, plant and equipment
= 8,630 ÷ 695 = 12

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Asset age ratio	Description	The company
Estimated time elapsed since purchase	The approximate age in years of a company fixed assets. Useful for comparison purposes.	Western Digital Corp. estimated time elapsed since purchase of depreciable property, plant and equipment deteriorated from 2021 to 2022 and from 2022 to 2023.

	Jun 30, 2023	Jul 1, 2022	Jul 2, 2021	Jul 3, 2020	Jun 28, 2019	Jun 29, 2018
Selected Financial Data (US$ in millions)
Property, plant and equipment, net	3,620)	3,670)	3,188)	2,854)	2,843)	3,095)
Land	269)	269)	278)	294)	294)	306)
Depreciation expense for property, plant and equipment	695)	708)	726)	797)	844)	871)
Asset Age Ratio (Years)
Estimated remaining life¹	5	5	4	3	3	3

Based on: 10-K (reporting date: 2023-06-30), 10-K (reporting date: 2022-07-01), 10-K (reporting date: 2021-07-02), 10-K (reporting date: 2020-07-03), 10-K (reporting date: 2019-06-28), 10-K (reporting date: 2018-06-29).

2023 Calculations

¹ Estimated remaining life = (Property, plant and equipment, net – Land) ÷ Depreciation expense for property, plant and equipment
= (3,620 – 269) ÷ 695 = 5

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Asset age ratio	Description	The company
Estimated remaining life		Western Digital Corp. estimated remaining life of depreciable property, plant and equipment increased from 2021 to 2022 and from 2022 to 2023.

Western Digital Corp. (NASDAQ:WDC)

Analysis of Property, Plant and Equipment

Property, Plant and Equipment Disclosure

Asset Age Ratios (Summary)

Average Age

Estimated Total Useful Life

Estimated Age, Time Elapsed since Purchase

Estimated Remaining Life