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        <title>Quantum Corporation Quarterly report pursuant to Section 13 or 15(d)</title>
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            <h3>Quarterly report pursuant to Section 13 or 15(d)</h3>
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                                <a class="menu-item " href="/financial-information/sec-filings/xbrl_doc_only/95">Cover</a>
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                                                                            <li><a href="/financial-information/sec-filings/xbrl_doc_only/95">Cover Page</a></li>
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                                <a class="menu-item " href="/financial-information/sec-filings/xbrl_doc_only/96">Financial Statements</a>
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                                                                            <li><a href="/financial-information/sec-filings/xbrl_doc_only/96">CONDENSED CONSOLIDATED BALANCE SHEETS</a></li>
                                                                            <li><a href="/financial-information/sec-filings/xbrl_doc_only/97">CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical)</a></li>
                                                                            <li><a href="/financial-information/sec-filings/xbrl_doc_only/98">CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS)</a></li>
                                                                            <li><a href="/financial-information/sec-filings/xbrl_doc_only/99">CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS</a></li>
                                                                            <li><a href="/financial-information/sec-filings/xbrl_doc_only/100">CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS&#039; DEFICIT</a></li>
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                                <a class="menu-item current" href="/financial-information/sec-filings/xbrl_doc_only/101">Notes to Financial Statements</a>
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                                                                            <li><a href="/financial-information/sec-filings/xbrl_doc_only/101">DESCRIPTION OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES</a></li>
                                                                            <li><a href="/financial-information/sec-filings/xbrl_doc_only/102">REVENUE</a></li>
                                                                            <li><a href="/financial-information/sec-filings/xbrl_doc_only/103">INVENTORIES</a></li>
                                                                            <li><a href="/financial-information/sec-filings/xbrl_doc_only/104">BUSINESS COMBINATION</a></li>
                                                                            <li><a href="/financial-information/sec-filings/xbrl_doc_only/105">LONG-TERM DEBT</a></li>
                                                                            <li><a href="/financial-information/sec-filings/xbrl_doc_only/106">LEASES</a></li>
                                                                            <li><a href="/financial-information/sec-filings/xbrl_doc_only/107">RESTRUCTURING CHARGES</a></li>
                                                                            <li><a href="/financial-information/sec-filings/xbrl_doc_only/108">NET LOSS PER SHARE</a></li>
                                                                            <li><a href="/financial-information/sec-filings/xbrl_doc_only/109">INCOME TAXES</a></li>
                                                                            <li><a href="/financial-information/sec-filings/xbrl_doc_only/110">COMMITMENTS AND CONTINGENCIES</a></li>
                                                                            <li><a href="/financial-information/sec-filings/xbrl_doc_only/111">FAIR VALUE OF FINANCIAL INSTRUMENTS</a></li>
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                                <a class="menu-item " href="/financial-information/sec-filings/xbrl_doc_only/112">Accounting Policies</a>
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                                                                            <li><a href="/financial-information/sec-filings/xbrl_doc_only/112">DESCRIPTION OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)</a></li>
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                                <a class="menu-item " href="/financial-information/sec-filings/xbrl_doc_only/113">Notes Tables</a>
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                                                                            <li><a href="/financial-information/sec-filings/xbrl_doc_only/113">REVENUE (Tables)</a></li>
                                                                            <li><a href="/financial-information/sec-filings/xbrl_doc_only/114">INVENTORIES (Tables)</a></li>
                                                                            <li><a href="/financial-information/sec-filings/xbrl_doc_only/115">BUSINESS COMBINATION (Tables)</a></li>
                                                                            <li><a href="/financial-information/sec-filings/xbrl_doc_only/116">LONG-TERM DEBT (Tables)</a></li>
                                                                            <li><a href="/financial-information/sec-filings/xbrl_doc_only/117">LEASES (Tables)</a></li>
                                                                            <li><a href="/financial-information/sec-filings/xbrl_doc_only/118">RESTRUCTURING CHARGES (Tables)</a></li>
                                                                            <li><a href="/financial-information/sec-filings/xbrl_doc_only/119">NET LOSS PER SHARE (Tables)</a></li>
                                                                            <li><a href="/financial-information/sec-filings/xbrl_doc_only/120">FAIR VALUE OF FINANCIAL INSTRUMENTS (Tables)</a></li>
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                                <a class="menu-item " href="/financial-information/sec-filings/xbrl_doc_only/121">Notes Details</a>
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                                                                            <li><a href="/financial-information/sec-filings/xbrl_doc_only/121">DESCRIPTION OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details)</a></li>
                                                                            <li><a href="/financial-information/sec-filings/xbrl_doc_only/122">REVENUE - Narrative (Details)</a></li>
                                                                            <li><a href="/financial-information/sec-filings/xbrl_doc_only/123">REVENUE - Disaggregation of Revenue (Details)</a></li>
                                                                            <li><a href="/financial-information/sec-filings/xbrl_doc_only/124">REVENUE - Certain Information Related to Contract Liabilities (Details)</a></li>
                                                                            <li><a href="/financial-information/sec-filings/xbrl_doc_only/125">REVENUE - Remaining Performance Obligations (Details)</a></li>
                                                                            <li><a href="/financial-information/sec-filings/xbrl_doc_only/126">INVENTORIES - Schedule of Manufacturing Inventories (Details)</a></li>
                                                                            <li><a href="/financial-information/sec-filings/xbrl_doc_only/127">INVENTORIES - Schedule of Service Parts Inventories (Details)</a></li>
                                                                            <li><a href="/financial-information/sec-filings/xbrl_doc_only/128">BUSINESS COMBINATION - Narrative (Details)</a></li>
                                                                            <li><a href="/financial-information/sec-filings/xbrl_doc_only/129">BUSINESS COMBINATION - Schedule of Intangible Assets, Net (Details)</a></li>
                                                                            <li><a href="/financial-information/sec-filings/xbrl_doc_only/130">BUSINESS COMBINATION - Intangible Assets, Net - Narrative (Details)</a></li>
                                                                            <li><a href="/financial-information/sec-filings/xbrl_doc_only/131">BUSINESS COMBINATION - Schedule of Estimated Future Amortization Expense (Details)</a></li>
                                                                            <li><a href="/financial-information/sec-filings/xbrl_doc_only/132">LONG-TERM DEBT - Schedule of Debt (Details)</a></li>
                                                                            <li><a href="/financial-information/sec-filings/xbrl_doc_only/133">LONG-TERM DEBT - Narrative (Details)</a></li>
                                                                            <li><a href="/financial-information/sec-filings/xbrl_doc_only/134">LEASES - Supplemental Balance Sheet (Details)</a></li>
                                                                            <li><a href="/financial-information/sec-filings/xbrl_doc_only/135">LEASES - Lease Cost (Details)</a></li>
                                                                            <li><a href="/financial-information/sec-filings/xbrl_doc_only/136">LEASES - Schedule of Lessee Operating Lease Liability Maturity (Details)</a></li>
                                                                            <li><a href="/financial-information/sec-filings/xbrl_doc_only/137">LEASES - Supplemental Balance Sheet Information (Details)</a></li>
                                                                            <li><a href="/financial-information/sec-filings/xbrl_doc_only/138">LEASES - Narrative (Details)</a></li>
                                                                            <li><a href="/financial-information/sec-filings/xbrl_doc_only/139">RESTRUCTURING CHARGES - Summary of Restructuring Expense (Details)</a></li>
                                                                            <li><a href="/financial-information/sec-filings/xbrl_doc_only/140">NET LOSS PER SHARE - Anti-dilutive shares excluded from the computations of diluted net income (loss) (Details)</a></li>
                                                                            <li><a href="/financial-information/sec-filings/xbrl_doc_only/141">NET LOSS PER SHARE - Additional Information (Details)</a></li>
                                                                            <li><a href="/financial-information/sec-filings/xbrl_doc_only/142">INCOME TAXES (Details)</a></li>
                                                                            <li><a href="/financial-information/sec-filings/xbrl_doc_only/143">COMMITMENTS AND CONTINGENCIES (Details)</a></li>
                                                                            <li><a href="/financial-information/sec-filings/xbrl_doc_only/144">FAIR VALUE OF FINANCIAL INSTRUMENTS - Debt (Details)</a></li>
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                <h4>INCOME TAXES</h4>
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